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There are many motorists that uses conventional oils and they change the oil every month and we still find sludge in the engines. The 3000 or 3 months regime for conventional oils has worked for many of our clients. When the car returns for oil change, we dont use engine flush in the engines again, we just change the oil and it works.There was a car that came for oil change and the engine was very dirty with sludge that we recommended flushing the engine. We flushed the engine and changed the oil. After the service, the engine knocked. The car that was driven into the garage, flushed for five minutes, knocked after the engine was flushed. What could have caused it? The sludge in the engine has been protecting the car, (the engine was already gone anyway)so when the sludge was removed, the engine knocked. Different strokes for different folks

Changing your Oil after 3000 miles is preferable in the country. As a practitioner in the auto service industry, owners of vehicles that defer their oil change for even a month after the recommended 3 months suffer oil sludge problems in their engines. There are vehicles that come to our workshops and the sludge in the engines are an eyesore but after flushing the engine and making them stick to the 3000mls/5000kms for conventional oils and 6000mls/10000kms for synthetic oils, there is no longer any occurence of sludge in their engines. An extreme driving condition description is what we face here, with the dust, heat and chaotic traffic, we better adhere to the rule or we face the consequence by losing money to fix engines.

Dexron 111. Not 111D or all those white fluids. Just Dexron 111. And you need 8 litres. And make sure the gear filter is changed if it is bad.

Regular unleaded fuel is the fuel commonly used in Nigeria. It is suitable for many cars and also limited to these set of cars. Toyota, Honda, Kia, hyundai, Some models of Nissan, Peugeot, etc. All mercedes uses Premium fuel, which was designed for high compression engines. VW states that if you happen to use Regular fuel on a Passat, do not use full throttle until you get to where you will buy Premium fuel. Other brands that uses Premium fuel are VW, Audi, porsche, infinity, Lexus,acura, Land Rover, Nissan jeeps and late Model cars. Using fuel not recommended for your car creates a lot of problem for your mobile investment. I know a lot of Motorists that imports octane Boosters along with their vehicles. But there are many motorists who claims that their car is fine and works well with regular fuel.
Rescue and Recovery Nigeria
Vehicle Transportation, Repairs and Emergency Rescue

Before Siena responds, I will advise you not to buy. It is already close to 180kms for a 4 cylinder that has been running on unleaded fuel instead of Premium for 3 years. It is the body you are buying. If you really want to buy, run a scan and post all that you read from the scanner. I guess Camshaft position sensor will be among the results.
Rescue and Recovery Nigeria

Contact us at nigeriaarc@yahoo.com. We have the technical expertiSe to solve all the issues concerning your VW passat. As for the Brother that is intereSted in buying a new car, flee from cars that requires Premium unleaded fuel unless you have the means to boost the fuel.

N8000 a week for fuel x 4 weeks = N32000
Octane Booster N1000 x 4 times=N4000
Insurance N5000 Third Party
Road Tax: Nil
Service: Every 22000 Miles using Polytron, Which means Once a year N30,000 oil change( 2 gallons of TOTAL 4X4, Oil Filter and Polytron).
TOTAL: N36,000 monthly
Range Rover Sport 06, Java Black
4.4 L, V8
18Inch tires with Speed rating V.
Average fuel Consumption 14 litres per 100kms
Fuel: Premium Unleaded

The cars you mentioned are those cars that have been tropicalised by the manufacturers for Nigerian Market. All Toyota, Honda, Some Models of Mazda and Nissans use Regular Unleaded. Mercedes Benz from Vbooth uses Premium fuel, VW, Audi, BMW (whether sold by Coscharis or Imported) all use Premium Unleaded. Range Rover Series,Acura, Lexus and Infinity uses Premium and the end result of using regular fuel for these high compression engines is an engine that would be happy very dead than being on the road.

You used Mobil Dexron 11 in your honda? Welcome to the club of transmission issues club

There is no filling Station that sells Dexron 111 but if you let me know your location or if you are in Lagos or Abuja, I can direct you to where you will perform all these services

When you use TOTAL q7000, 5 ltrs and filter and Labour,N8550. If there is sludge, you need engine flush. that makes it N10,050. ATF for Honda is Dexron 111 or ATFZ1

Send us a mail. We can send it to you from Abuja. nigeriaarc@yahoo.com

What ATF oil did you put in the Honda? Dexron 111 or ATFZ1? Anything will not work

When you changed the transmission oil, what ATF oil did you use? Secondly, your passat is very mindful of the fuel you use. It does not tolerate regular unleaded. The issue with transmissions in Passat is a legendary one that even VW in Germany could not help, concerning gear box failures in Nigeria. What I will suggest in the interim is to check the gear brain box by the pigeon hole. Maybe the cables you complained of were the cables that is linked to the gear brain box.
Joyeous Noel a tout le Monde
Merry Xmas everyone
Please put on your headlights when you are on the highways and fasten ur seat belt at the rear.
Join our BE SEEN, BE SAFE road safety campaign. If your tyres are not temperature A, please change them. If you have winter tyres on your car, change them. Life has no duplicate but your car can be duplicated.
Rescue and Recovery Nigeria.

Is there Service Engine Soon on your dashboard. Do the scan and let us know
Rescue and Recovery Nigeria Limited

If anyone goes to Owode to look for VW parts, you will find out there is no gear box in almost all the VW cars in the parts shops. Fuel, Fuel Fuel. That is the problem. I held a meeting with the Major Car dealer in Lagos and he told me that his job was to sell cars while my job was to put pressure on the government to start producing Premium fuel. I went to SON and they confirmed that we use Regular Unleaded. This wss in 2006 when we just converted to unleaded fuel. Many of you will remember that before 2005, when you buy fuel at the fuel stations, they use a rod to open the fuel cap because the pump nozzle was too big for the unleaded cars that were being destroyed by leaded fuel. PPMC, in a meeting that I had with them at NNPC Towers in Abuja in 2006, told me that any car that does not use unleaded regular is on his own. I suggest that every potential car owner should research well before buying a car, a car that works with Nigerian fuel. Mitsubishi Motors have tropicalised their cars to run on unleaded regular, ditto Porsche, Chrysler. Mercedes is run on Euro 2 in the country and we all know what that means.
Rescue and Recovery Nigeria

Intake Air Temperature Circuit Malfunction

What does that mean?The IAT (Intake Air Temperature) sensor is a thermistor, which basically means it measures air temperature by detecting resistance in the air. It's usually located somewhere in the intake air ductwork, but can be located in the intake manifold on some applications. It is usually a two wire sensor supplied with a 5 volt reference wire (which also acts as a signal wire) from the PCM (Powertrain Control Module) and a ground wire.

As air passes over the sensor the resistance changes. This change in resistance affects the 5 Volts supplied to the sensor accordingly. Colder air causes higher resistance and higher signal voltage & warmer air lower resistance and lower signal voltage. The PCM monitors this change in the 5 Volts and calculates air temperature. If the PCM detects a voltage that is out of normal operating range for the sensor, P0110 will set.


SymptomsThere may be no noticeable symptoms other than MIL (Malfunction Indicator Lamp) illumination. However, it could be possible that you may experience poor drivability complaints.

CausesPotential causes of the P0110 DTC include:

IAT sensor shifted out of airflow
Bad IAT sensor
Shorted to ground or open on signal circuit to IAT
Open in ground circuit to IAT
Poor connection at IAT (backed out terminals, broken connector locks, etc.)
Bad PCM
Possible SolutionsFirst visually check that the IAT is in place and hasn't been dislodged. As a quick check of the IAT, use a scan tool & check for IAT reading with KOEO (Key on engine off). If the engine is cold, the IAT reading should be the same as the CTS (Coolant temperature sensor) reading. If it shows more than a few degrees variance (for example, if it indicates a temperature extreme like negative 40 deg. or 300 deg. then obviously there's a problem) unplug the IAT and do a resistance test across the two terminals.

Each sensor will have different resistances so you'll have to get that info from a repair manual. If the resistance of the IAT sensor isn't within specs, replace the sensor. There should be some resistance, so if it measures infinite resistance, replace the sensor.

Having said that, here is a little more diagnostic info if that doesn't take care of it:

1. If your KOEO IAT reading is at the high extreme, like 300 deg. (which obviously is inaccurate), disconnect the IAT sensor. If the reading now shows the lowest extreme (-50 or so), then replace the IAT sensor. However, if when unplugging the IAT, the reading doesn't change then turn off the ignition and disconnect the PCM connector. Use a voltmeter to check for continuity between a good ground and the signal wire to the IAT. If there is continuity, then repair short to ground on the signal wire. If there is not continuity, then the PCM may have a problem

2. If your KOEO IAT reading is at the low extreme, again disconnect the IAT connector. Check that there is 5 Volts on the signal and the other is grounded.
Knock Sensor 2 Circuit Malfunction (Bank 2)

What does that mean?A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged. The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor wasn't operating properly, so that it was always indicating a knock, the engine computer's response may have been to change the ignition timing on your engine. Knock sensors generally bolt into or thread into the engine block. This P0330 code may show up intermittently or the Service Engine light may be lit constantly. Other knock sensor related DTC codes include P0325.

SymptomsYou may notice drivability problems including a lack of power and perhaps some hesitation. There may also be other symptoms.

CausesA code P0330 most likely means one or more of the following has happened:

The "B" knock sensor is faulty and needs to be replaced
There is a wiring short/fault in the knock sensor circuit
Possible SolutionsCheck the resistance of the knock sensor on bank 2 (compare it to factory specs)
Check for broken/frayed wires leading to the sensor
Replace the knock sensor on bank 2

a. If you have 5 volts present and a good ground, jumper the two terminals together. Now the reading on the scanner should be at the high extreme. If it is, replace the IAT sensor. But if it stays low even after you jumper the two wires together, then there may be an open in the wiring harness or a problem with the PCM.

b. If you don't have 5 Volts present, then check for reference voltage back at the PCM connector. If it's present there but not at the IAT sensor, repair the open in the signal wire.


Other IAT sensor and circuit related DTCs: P0095, P0096, P0097, P0098, P0099, P0109, P0111, P0112, P0113, P0114
Voila.
Rescue and Recovery Nigeria

System Too Lean (Bank 1)

What does that mean?Basically this means that an oxygen sensor in bank 1 has detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. The P0171 is one of the more common trouble codes.

This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses that reading and adjusts to keep the engine running at that optimum ratio of 14.7:1. If something is not right and the PCM cannot maintain the 14.7:1 ratio, but rather there is too much air, it triggers this code.


Symptoms:You will more than likely not notice any drivability problems, although there may be symptoms such as:

•a lack of power
•detonation (spark knock)
•rough idle
•hesitation/surge on acceleration.
CausesA code P0171 may mean that one or more of the following has happened:

•The MAF (Mass Air Flow) Sensor is dirty or faulty
Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
•There could be a vacuum leak downstream of the MAF sensor
•Possible cracked vacuum or PCV line/connection
•Faulty or stuck open PCV valve
•Failed or faulty oxygen sensor (bank 1, sensor 1)
•Sticking/plugged or failed fuel injector
•Low fuel pressure (possible plugged/dirty fuel filter!)
•Exhaust leak between engine and first oxygen sensor
Possible SolutionsA lot of times, cleaning the MAF sensor and finding/fixing vacuum leaks fix the problem. If you're on a tight budget, start there, but that may not be the fix for certain. So, possible solutions include:

•Clean the MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
•Inspect all vacuum and PCV hoses, replace/repair as required
•Inspect all hoses and connections in the air intake system
•Inspect and/or test the intake manifold gaskets for leakage
•Check for a dirty fuel filter and proper fuel pressure
•Ideally you'll want to monitor short and long term fuel trims using an advanced scan tool
•If you have access, you may want to run a smoke test

Siena, thanks for your response. At Least the brother now understands a lot about his car. My range Rover sport recommends Premium while Nissan jeeps recommends Premium too. For maximum performance. Land Rover LR3 requires premium only same thing with VW, MB and BMW. Whenever I buy fuel without using the booster, a check engine light appears on the dash and the result of the scan is cylinders are misfiring and the system is too lean or rich as the case may be. Let the brother check his. Engine oil cap if he has sludge, which is another common feature. His coming to my workshop is to put everything in order. Who knows if the plugs on the car are meant for Toyota Corrola as most people buy plugs without reference to the car manual. Whenever I travel to Abuja from Lagos, I spend 10k on fuel for a journey of 799kms and the booster has proved to be a cost saver. I did not even know you are not in Nigeria, I was thinking of rubbing minds with you. Thanks to the brother who did that research on fuel. I advise all motorists to do the same.it is very important. Fuel related problems in cars is becoming a major headache for motorists.

Siena, thanks for your post. At. Least you admit that using low octane fuel can cause poor fuel economy and the brother has changed many components that are fuel related. The first thing that goes bad in a car using low octane fuel is the 02 sensors and then the air and fuel sensor will go bunkers and the MAP will be sending wrong signals to the ECU. In my workshop, this has been the solution that we recommend to our clients and it works. Let the brother goggle the effect of using a low octane fuel on a Lexus that requires Premium Unleaded fuel. The end result is a knocked engine or a bad. Transmission. The money that the brother has spent on finding the solution is higher than a little fraction he will spend buying boosters. Where are the VW cars on the roads, even golf 3, V booth mercedes uses Premium and ask those that drive them what cost using the car has made them to cough out. Even among new cars, the issue is raging. Mercedes bring in cars that run on leaded fuel while Stalion bring in Porsche that runs on unleaded fuel. What is the actual fuel that we use in the Country. Regular unleaded. VW advises that you don't use full throttle when you buy low octane fuel. What is the cause of ignition timing over advanced which is now common in almost all Nissan and Infinity cars? Why is Camshaft position sensor always a common feature in Mercedes? Fuel, low octane fuel being used on a car that requires Premium. Even in America, they still use octane Boosters in cities where there is no Premium. Most AMG cars uses higher Octane fuel like 93 and where there is 91 available, they use booster to boost the octane. Let the brother continues to spend money on parts that is in order when all he needs is just changing to a higher fuel that his car requires. It is his money and he has the right to spend it the way that pleases him.
Rescue and Recovery Nigeria

DEXRON 11 IN THIS CASE IS 11 e AND YOU CAN BUY FROM MOBIL OR IN THE ALTERNATIVE CONTACT FOR THE REAL DEXRON 111. NIGERIAARC@HOTMAIL.COM

Contact us at nigeriaarc@yahoo.com for the Dexron 111 ATF from Gard.

You have been wasting your money on things that are not important. Lexus cars run on premium Unleaded fuel and using Regular unleaded will make your Engine Control Management to retard the ignition timing to prevent the car from knocking and this process will make you lose fuel, your exhaust is full of carbon deposits while your engine is filled up with carbon too. What to do is to get Octane Booster to boost the fuel to Premium. Contact us for directions on how you can visit our workshop in Lagos or Abuja. We surely have all that you need to put that wonderful car on the road. nigeriaarc@yahoo.com
Rescue and Recovery Nigeria Limited

For the acura mdx, no nigerian oil marketer is producing atf for newer cars. Mobil atf is dexron ii e which is the entry level for 1998 toyota till 2001: after that year, it serves no purpose. Acura has a long history of transmission failure and using the wrong oil is trouble. Your inlaw should buy honda atfz1. That is the atf recommended for all honda and acura. Send us a mail with your location and you will know the next step. As for the sp iii, they are available but you need to send us a mail stating your location and tel. number.
Rescue and Recovery Nigeria

Yes, you can use ur driver 's licence from the US in Nigeria. Make sure it is the International version of it. Go and obtain it there and that gives you access to our smooth roads.

SP 111. Same for hyuandai, Kia.

What year is your rodeo? You can use dexron iii which is not available in the open market. Don't use iiid oil. We can get it for you if you can send us a mail with your location

There is nothing extraordinary about maintenance. Ensure first of all that there is no sludge in your engine, check the transmission fluid if it is an auto gear andif it has burnt smell or the colour is black, then change the oil. Be careful not to use any type of ATF. Honda uses ATFZ1 and unless otherwise stated like using Dexron 111, any other oil is not good for your car. Change the air filter regularly and dont let the local mecs tropicalise your vehicle by removing the thermostat.If you have sludge, use engine flush before you drain the old oil. Check your tyres if they are good for Nigerian Roads. Most vehicles are equipped with winter tyres and they are very dangerous for our roads. Look for the speed rating and the temperature A on the tyre. A typical Nigerian Spec tyre is stated as follows: 195/55/15/84H. H is the speed rating of 210km ph. If you are in Lagos or Abuja, you can come to our quick service outlets. You are also lucky that the car runs on unleaded Regular fuel. Happy Motoring.
Rescue and Recovery Nigeria Limited

With the growing trend of failed automatic transmissions, it is imperative that you use the right transmission fluids for your vehicle. There are no fake transmission fluids in Nigeria, it is the motorist who is not aware of the fluid that their vehicles require and as such uses any fluid that is cheap and affordable. You find people using Abro on a Murano and you begin to agonise on their behalf. Why is this common like finding a motorist with a blackberry phone putting Dexron 11 ATF on a vehicle that requires Type IV when he can easily google the type of ATF to use or like a gentleman that used Dexron 111 on a 2008 Mercedes Sclass. Why buy a car you cannot maintain? As we prepare for the festive season associated with mass movement, do this for your vehicle: check if there is sludge in your engine, if your ATF is black or has a burnt smell, if your gear has shifting problem, and also check if your tyres are winter or all season tyres with reduced speed capability. If you are buying new tyres, ensure that they are all traction A, temperature A. Change your air filter regularly and if you need further assistance on the above issues, send us a mail and we shall respond as soon as possible. nigeriaarc@hotmail.com or info@arcnigeria.com
Rescue and Recovery Nigeria Limited

In Nigeria, we use unleaded Regular and many cars require this grade of fuel. But majority of the other cars requires a higher fuel, premium unleaded. What do you do if you are faced with this problem? Octane Booster is your best bet. Many people still believe that we use leaded fuel and there are many new cars that is programmed to work only on leaded fuel and they are being sold brand new in Nigeria.

In an extreme driving condition, all engine oils must be changed at 3000 miles or 3 months. Failure to do so will result in sludge in your engine. Our weather condition is extreme, dusty and hot, you need no expert to tell you when to change your oil. In maiduguri, majority of the motorists add oil treatment to their oil because of the excessive heat. Mercedes is programmed for 20,000 kilometers before service, that is in Europe and America but when it comes to Africa, it is a different ball game. Most garages advise that you service your car at every 3000mls or 5000 kms or 3 months. I know a guy that uses over 3000 mls in two weeks and he comes for service because he is following the best counsel.
Oil Sludge: an expensive but preventable disaster
Every year, more of my customers suffer through unnecessary and very expensive engine re-builds due to oil sludge. The causes are complex but sludge damage can be prevented.
The oil sludge problem is reaching epidemic proportions on many 1997 and newer cars, with the following cars greatly affected:
 Audi - 1997-2004
 Chrysler - 1998-2002
 Dodge - 1998-2002
 Hyundai - 1998-2004
 Lexus - 1997-2003
 Toyota - 1997-2003
 SAAB - 1999-2003
 Volkswagen - 1997-2004

What is oil sludge?
Oil sludge is the breakdown product of over-stressed oil in your engine.
Oil that is stressed by contaminants and oxidation-or has to work thousands of miles longer than it was designed to-will break down into a gel that sticks to your engine parts. As the sludge sticks, there is less good oil to circulate and do its protective job. This coating of gel also stores heat instead of releasing it which stresses the radiator and cooling system.
Although at first the motor oil level may appear OK, a sludgy engine is being damaged with EVERY stroke. Your engine may lose oil pressure, get terrible gas mileage, and other components might mysteriously fail such as timing belts, idle speed controls, and gaskets.
Sludge begins to appear in the oil pan and valve covers. Oil filler cap inspection as an indicator of sludge build-up is not conclusive, as normal engines can have a small amount of sludge and condensation present at this 'high point' of the crankcase.
Why is oil sludge affecting more cars?
My research and experience concludes that both environmental and financial pressures have combined to affect your oiling system. Here's how:
Environmental pressures:
1. In the struggle to pass tougher federal emissions specifications, car manufacturers have raised engine operating temperatures and increased exhaust gas recirculation (EGR). In 1996, tighter federal emissions standards were enacted. Fuel mixtures have to run leaner, and leaner mixtures cause higher combustion temperatures. When nitrogen in the air is raised to higher temperatures it is converted into new contaminant cocktails. By 1997, sludge is appearing as a major problem.
2. New "long-life" antifreeze was introduced in 1995 to reduce the amount of chemical pollution in our environment. But longer 100,000-mile radiator service intervals often leads drivers to neglect their cooling systems. Worn-out coolant takes on an electrical charge that chemically acts like acid on engine parts. Depleted coolant also results in higher engine temperatures.
3. Federal pressures for more fuel economy in cars and trucks led car manufacturers to design engines for lower viscosity motor oils. Lighter oils tend to break down faster under urban driving conditions.
Financial pressures:
1. Some manufacturers recommend oil change intervals longer than 3,000 miles to market their cars' quality or to appeal to buyers on a budget. Consumers, already paying on auto loans, are reluctant to spend money for maintenance and embrace these extended intervals.
2. Quick lube shops competing for your business cave into pressure for bargain oil changes. To cut costs, they might buy single weight oil in bulk or use recycled oil. They use cheaper, less durable oil filters. Low-wage, inexperienced technicians sometimes make servicing mistakes when trying to work faster.
A very short history of oil change intervals
With oil prices so high in the early 1970s, and with engine designs evolving, Mobil introduced the Mobil 1 synthetic oil for gasoline engines. At the time, Mobil was promoting 20- or 25,000-mile oil changes with synthetic products, but they soon backed down from this.
In the 1980s, Toyota came out with a 10,000-mile oil change policy, in part to brag about the quality of their cars but mostly to market low maintenance costs. After receiving thousands of warranty claims for engine repairs from angry customers worldwide, they backed off of this absurd recommendation and went back to 3,000 mile intervals.
Improvements in motor oil chemistry in the 1990s encouraged many car makers to promote long oil change intervals. The long intervals actually worked OK until 1996, with very few sludge-related engine failures reported and many happy customers driving up to 10,000 miles between changes. After 1996, tighter emissions standards added pressure to the oiling system, and problems appeared.
Now in the 2000s, oil sludge buildup and sludge-related engine failure is a costly and frustrating nightmare for many. What's going on?

Your car's oiling system is its lifeblood
The oiling system in an engine is similar to the vascular system in a human body. It must absorb and release toxins, transfer heat, and suspend harmful particles until they can be filtered out. Unlike the blood in your body, though, engine oil is not self-renewing and has a limit to how much stress it can safely handle before it needs to be removed and refreshed.
As your car is driven, oil is pumped under pressure from the oil pan up through the oil pump. The oil pump sends oil to the crankshaft and camshaft, and is squeezed into the tiny channels of the motor. The moving parts also splash oil onto other components in the crankcase, and finally it falls under gravity back into the oil pan. Meanwhile, about 20% of the oil flow is diverted to the oil filter for cleaning. On some engines, an external oil cooler is used to dissipate heat from the engine.
Motor oil has a complex chemical job to do. While lubricating your engine's moving parts at high temperatures, motor oil carries combustion by-products, collects airborne contaminants from the air-intake system, and absorbs and releases small amounts of water from engine heating and cooling. Circulating motor oil also suspends acids that are formed by chemical reactions in the crankcase. Sometimes tiny leaks allow some fuel or coolant to creep into the oiling system.
How oil does its job
Motor oil is a refined base stock with chemical additives. These additives work to suspend contaminants, inhibit corrosion, coat metal parts, keep viscosity stable, and slow oxidation.
As you drive, the combustion process allows small amounts of unburned fuel to escape into the oiling system which causes oil contamination. Contaminants are handled by:
 oil additives, which suspend and contain the contaminants to prevent damage to metal engine parts
 the oil filter, which captures large particles that are suspended by the additives
 the PCV system (positive crankcase ventilation) uses a vapor separator to capture the lighter, gaseous contaminants and recirculate them back to the combustion process while the heavier contaminants drain down into the oil pan. So not only is the PCV system an important emissions device, but it's also crucial to keeping your motor oil clean.
As contaminants build up, the oil base itself starts to oxidize and turns the familiar red-brown color of worn-out oil. If not changed promptly, your engine is irreversibly damaged by chemical reactions, heat, and friction.
What makes synthetic oil superior to conventional oil?
I recommend synthetic motor oil to all my customers to prevent sludge. Why?
Synthetic motor oil is made from a blend of mineral oil, natural gas, and special additives. Because this blend is extremely pure from the beginning, it can withstand more torture in your vehicle's engine.
Synthetic lubricants cost just slightly more than conventional oils, but offer the best engine protection because:
 synthetics remain stable at high temperatures (conventional oils break down faster at today's higher engine temps)
 synthetics remain fluid at very low temperatures (conventional oils thicken)
 additive packages are formulated with special chemicals for top cleaning and anti-oxidant protection
Remember, you can switch to synthetics on any car regardless of age or previous motor oil. If your vehicle has been acting up, have your technician check for sludge.
So why don't all cars suffer from sludge?
Some car makers stay with the standard 3-month/3,000 mile oil change interval. Others, such as BMW's longer interval, rarely cause any problems. Why? Their new engine designs call for a 7 or 8 quart capacity, almost twice that of the average car—and they specify full synthetic motor oil.
In addition, some drivers protect their cars by ignoring the recommended longer interval and changing their motor oil every 3,000 miles. These drivers ask for high-quality oil and filters, and keep up with other maintenance schedules.
Remember—any car can suffer an oil sludge problem, and some manufacturers more than others due to various design differences. It's to your advantage to get a technician's advice on what interval your engine and driving habits REALLY requires, and take matters into your own hands!
Rescue and Recovery Nigeria Limited.