Rick's Free Auto Repair Advice

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

High mileage oil

What’s the deal with high mileage oil and high mileage oil filters People always ask me if they should buy high mileage oil. Here’s my take on it. This article is just one in a series. If you’d like to know more about oil click on the links below. Choosing the right motor oil Chrysler’s 3.5-liter engine has oil sludge issues High mileage oil and oil filters Oil Viscosity Warning Synthetic Oil Facts and Myths Synthetic oil versus conventional oil What motor oil to use What oil brand is best … Read More


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