Posts Tagged: oil additives

Oil additives

Oil additives — do they work? Not really. With just one exception, they are a complete waste of money. They will not improve performance or mileage. They work only to enrich the companies that make this snake oil. Modern API SN+ and the newer GF-6 oils contain all the additives you need. In fact, adding an additive may actually reduce the protection provided by the newer oils. But there is one exception. If you have an older (80’s or older) engine with high friction flat tappet valve lifters, you might … Read More