It may be tempting to mix the oil already in the car with a different type, but this may not be best for the car’s health. We investigate if it’s okay to mix different engine oils. Is it okay ...

Demands on heavy-duty diesel engine oils have changed alongside engine technology and fuel formulations. “As engine technology and fuel technology have evolved, the environment in the crankcase ...

the starter spins the engine which turns the oil pump, pressurizing the oil system. Until the oil pump can supply fresh oil to the bearings from the oil pan there is no protection for them ...