When my engine is off the dipstick shows that there is just about no oil in the system. When the engine is running the dipstick shows that it is full and then some. What would cause this? And is it normal for wisps of white smoke to come out of the dipstick tube when checking the oil? (With the engine on.)
Also, when getting the oil changed it was jet black in color and fairly sticky. What would cause this?
Because it was black and sticky they said there is some sort of "engine flush" that can be done. Legitimate service or just another way to take money?