Oil is your car engine’s lifeblood. Checking the level every couple of weeks will alert you to a problem if your car is consistently burning or losing oil.
But oil level isn’t the only issue. As it circulates through your engine and ages, oil gradually wears out. “If you don’t change the oil regularly, your engine just isn’t getting the lubrication it needs,”
It causes excessive exhaust pollution. It causes the engine to overheat. It increases the amount of petrol or diesel required.
Issues with the oil are the most common and potentially costly car maintenance problem.