The best synthetic oils offer more mileage, keep the engine cleaner, perform equally well ... Some automotive enthusiasts will argue that conventional oil performs the same as synthetic oil ...

Your average all-purpose cleaner won’t remove burned-on oil from around the edges of your valve covers or the dirt that is cooked onto the top of the engine cover. That is where an engine ...

The negative effects of unmitigated carbon buildup can include poor fuel efficiency, loss of horsepower, check engine lights, misfires and excessive emissions.