The 'dirty oil trick' has been used for years by con artists who'll trick you into thinking your engine is broken and try and ...

Most vehicles now employ an expansion tank that allows the coolant to expand, and exit, the cooling circuit when hot, and to return when the car is turned off and the engine cools. The cooling ...

If you have to remove the coolant tank lid, always do it when the engine is cold as the coolant ... as internal leaks can make it look like your car is losing coolant without a leak.