Hello Paul, my Mercedes C200 has been parked for four years and I have been advised to flush the engine. Apparently the oil has become thick and lumpy. Can I flush it at a petrol station? George Hello ...

•Lubricating oil in its natural state is supposed to be clean and must be easy to flow to reach all the moving parts within the shortest time possible. •Once the oil starts to get dirty, the ability ...

Many years ago I foolishly drove a car at least 25,000 miles without changing the oil. I guess I figured I’d wait until the red light on the dashboard lit up, and then I’d know I needed fresh oil.