Q. I have a 2002 Ford Focus ZTS with 72,000 miles. Every so often when I stop, there is a slight burnt-oil odor in the passenger compartment. It was suggested that due to the slight oil leakage, the ...

As a vehicle's engine operates, the intake and exhaust valves open and close rapidly while the pistons move up and down in the cylinder. These mechanical actions require a constant supply of hot oil ...