How to Know When Your Car Needs an Engine Oil Change

https://future-wiki.win/index.php/How_to_Know_When_Your_Car_Needs_an_Engine_Oil_Change

If you hear a knocking sound from under the hood or feel a rough idle, your oil may be too old or low. Engine oil leaves a sludge when it breaks down, so slipping your finger inside the fill cap to see if the oil feels gritty or smells burnt is a quick check. Most modern cars also have an oil life monitor that calculates wear; when it reaches 15% or below, you should schedule a change. Don't just trust the odometer—your driving style matters. Short trips, heavy traffic, or extreme temperatures…