TRYGO:

Vehicle manufacturers over the years have modified vehicles to be more fuel efficient, by incorporating various types of technological strategies, ranging from cylinder deactivation systems (on Honda, Ford, "V" engine configurations); VVT-i(variable valve timing ignition) systems; and turbo chargers.
If your car has either of the above installed fuel efficient systems, and your car's fuel efficiency is poor, you probably need to check the following:
1. Engine air filter. Clogged filters distorts a car air fuel ratio negatively, making a car's computer system atomizes more fuel in the combustion chambers
2. Engine idling. Avoid excessive idling of the engine, after start-up, or in traffic. This wears your engine more, and consumes more fuel.
Put off the engine when not in use.
3. AC system. If you're the one that regularly turns on your car's AC system, know that the AC system, adds more load on the engine when the compressor is engaged. Want to use the AC system, and you're worried about fuel issues?
**open your car's windows if you'd parked the car in the sun, before turning in the AC. This would reduce the tremendous amount of work the AC system does, and exerts in your AC system before cooling.
**avoid parking your car in the sun. Look for a shady area.
4. Avoid aggressive driving. When you drive aggressively, it's proportional to increased fuel usage.
Avoid sudden brake applications, and sudden takeoffs.
5. Under inflated. Under inflated tyres increases a car's rolling resistance, which is always translated to increased load on the engine, and subsequently a safety concern for the driver and passengers.
Ensure all tyres are uniformly gauged according to manufacturer's standard.
6. Intake air ducts. All air intake ducts in the engine bay should all be checked regularly to avoid air leaks. A leaky sir duct, falsely commands a car's computer system yo atomize more fuel, thereby affecting your consumption.
7. Spark plugs. Worn out spark plugs would always affect a car's consumption rate. If your plugs are worn, it takes tremendous energy and time for the spark to be ignited, and travel straight down to the combustion chambers, to cause a major ripple effect necessary for your car's dynamics.
I do hope this short piece was helpful.
Drop us a comment in the comment bar, pls.

TRYGO:
@Nonso. I did forgot to include that fact. Vehicles fitted with ECT( engine coolant temperature) sensor, should never be removed. They should be replaced, if they've failed.
Forget about the Nigerian mechanics mentality, telling people to remove their cars thermostat (ECT), just because the car was brought from another different (cold) whether.

Thanks for the reminder Nonso.

starlionnotch:
Gazzuz and all, how about the exhaust system, i suspect that is what could be draining my fuel on my 1999 toyota avensis.
Or are there other suspects?

GAZZUZZ:


Are you the author?

http://www.engineeringapps.net/profileview/ybmjgtxtgz#subject_415

tofolo:
Hello Gazzuzz i sent you a text but you aint replying i need to talk to you about a particular car.

GAZZUZZ:


So sorry Sens sms again. Sometimes my phone gets filled and I delete all without reading a lot of them.

tofolo:
i just did now and it has delivered.

GAZZUZZ:


No one removes the ECT sir. What the remove is the mechanical thermostat that was supposed to restrict the flow of coolant until it reached a specified target temp before flow is permitted.

Also what is also done is the fans are connected directly to ignition so the fans stay on as long as the engine is running.

nairamaniac:


pls to what extent(percentage) does this act affect the fuel consumption?

I mean if the fan is connected directly, to what percentage does it drop the milage per gallon?
Thanx

cc Nonso84

GAZZUZZ:


I don't have figures. But as bad as 30per fuel efficiency loss