₦airaland Forum

There is a dangerous tradition in the Nigerian car market that needs to be addressed with Engineering Certainty. As a Lube Engineer, I’ve observed that 80% of Engine Knocks are not caused by bad luck or proper maintenance, but by Chemical Violation.

The Akamu Analogy:
When a manufacturer specifies 0w-20 or 5w-30, they are talking about the Flow Rate required to lubricate the top of your engine in less than 1 second. When you use 20w-50, you are essentially trying to pump Akamu through a needle.
​
Why is 20w-50 so popular?
​Ignorance: Most road-side technicians are still using 1980s logic for modern engines.
​Cost: It’s the cheapest fluid on the shelf.
​Sound: It hides the tapping sounds of a worn engine, giving you a false sense of security.

​The Reality:
Your Oil Cap is the Bible of your engine. If it says 5w-30, that is the ONLY grade that can safely navigate the microscopic clearances of your VVT system.

​The Nigerian sun is hot, but your engine's internal operating temperature is the same everywhere in the world. Engineering doesn't care about your feelings or the weather.

​Stop paying for Cheap advice that leads to Expensive repairs.

Poverty is the major cause of using 20 w50, the cost of parts are nearly out of reach of most vehicles operators,not ignorance as per say. 😐

Carmadesimpe:
There is a dangerous tradition in the Nigerian car market that needs to be addressed with Engineering Certainty. As a Lube Engineer, I’ve observed that 80% of Engine Knocks are not caused by bad luck or proper maintenance, but by Chemical Violation.

The Akamu Analogy:
When a manufacturer specifies 0w-20 or 5w-30, they are talking about the Flow Rate required to lubricate the top of your engine in less than 1 second. When you use 20w-50, you are essentially trying to pump Akamu through a needle.
​
Why is 20w-50 so popular?
​Ignorance: Most road-side technicians are still using 1980s logic for modern engines.
​Cost: It’s the cheapest fluid on the shelf.
​Sound: It hides the tapping sounds of a worn engine, giving you a false sense of security.

​The Reality:
Your Oil Cap is the Bible of your engine. If it says 5w-30, that is the ONLY grade that can safely navigate the microscopic clearances of your VVT system.

​The Nigerian sun is hot, but your engine's internal operating temperature is the same everywhere in the world. Engineering doesn't care about your feelings or the weather.

​Stop paying for Cheap advice that leads to Expensive repairs.

The fact is that most Nigerians don't even anything about oil viscosity. Their mechanic just tell them Mobil or total is a good oil and they just go to buy anyone they see. They don't knw those oils have different types and oil ratings for specific cars.

When the price of 5litres of recommended engine oil is higher than minimum wage, clearly, local man can't afford it so he ends up with the cheapest option available to him at the expense of his engine. Chaiiiii!

A wise man once said it's "different strokes for different folks"

The engine oil you are discriminating is the best for Old generation cars and no issues thus far.

Whois:
A wise man once said it's "different strokes for different folks"

The engine oil you are discriminating is the best for Old generation cars and no issues thus far.

You're correct if by older cars you're talking about air-cooled vehicles like the Volkswagen beetle.

The cause being ignorance and poverty, many Nigerians know the correct viscosity but decide to follow their illinformed mechanics "advice" of 20W50 while fully knowing what is right.
Sometimes it is just about not having enough money, so they cheapen out, the car is better parked and unused when this is the case, oil is the heart of anything with moving parts, fumble the oil and you'll understand why those who use recommended weights do just that.
The only exception to this rule is when your engine is high mileage and or already severely abused, you hear all sorts of engine noise when it runs (clacking clapping yabbing 😂) that is when you should use heavier oils like 20w50 to quiet things down until you have the money to rebuild/replace the engine.

The Akamu Analogy: LWKMD 😅🤣😂

20w50 ,I dey use am.due to a stuck ring on cylinder 4. And e still dey work...tho e no get good fuel economy but if your car dey burn oil or short oil. 20w50 slows it down. Normally e go chop 1 liter per 50km ..if na 5w30. E go chop 1.5 liter per 20km.

I’ve read through the comments, from the economic struggles to the my mechanic said stories. As a Lube Engineer, I’m not here to argue; I’m here to provide an Audit.

If you are using 20W-50 in a car built after 2005 because Nigeria is hot or money is tight, you aren't actually saving money. You are paying a Secret Tax.

1. The Petrol Tax (Fuel Economy)
Thick oil like 20W-50 is like trying to swim through honey. Your engine has to work 3x harder to pump that akamu through its tiny oil passages.

The Math: Using 20W-50 typically reduces fuel efficiency by 3–5%.
The Result: At current petrol prices, if you spend ₦100,000 on fuel a month, you are wasting ₦5,000 extra just because your oil is too thick. Over 6 months, that's ₦30,000,more than the cost of a premium synthetic oil change!

2. The VVT Death Sentence
Modern engines (Toyota VVT-i, Honda VTEC, etc.) use oil as a hydraulic fluid to move engine parts. 20W-50 is too thick to enter those microscopic holes.

The Result: Your check engine light comes on, your fuel consumption sky-rockets, and eventually, the engine knocks.

3. The Nigeria is Hot Fallacy
Your engine operates at 90°C to 105°C regardless of whether you are in Lagos or London. The cooling system regulates the heat. 5W-30 is designed to protect at those internal temperatures. 20W-50 only adds friction, which creates more heat.

The CarMadeSimple Verdict:
If your engine is already dying and smoking, use 20W-50 to buy time. But if your engine is healthy, Synthetic 5W-30 is Insurance.

Poverty is real, but a ₦1.5M engine replacement is much more expensive than a ₦50k oil change.

Stop managing. Start auditing. 🛡️

Babatundehy:
You're correct if by older cars you're talking about air-cooled vehicles like the Volkswagen beetle.

By older cars I mean 2006 backwards.

My 2000 Chrysler town and country is 13yrs in my hand now and I just came back from the village with it and that is what I have been using for all of my cars. Never opened my engine save to change seal and gasket once.

So, I disagree with the op. Maintenance is key.

Nigerians have a terrible maintenance culture and it is only when their oil is crude oil black and that they want to travel is when they charge their oil.

Carmadesimpe:
I
If you are using 20W-50 in a car built after 2005 because Nigeria is hot or money is tight, you aren't actually saving money. You are paying a Secret Tax...

Ehen! If you say after "05" I cannot argue much. When my replacement cars land then if I use it, then I will come back and disagree.