Best Oil Additive: Reviewed and Ranked

Oil additives are the bottles you pour into the crankcase to chase a specific problem — quieting lifter tick, slowing an oil burner, or boosting protection on a high-mileage engine. Most modern oils already have a full additive package, so dumping more in is rarely a miracle; the useful cases are targeted (a seal conditioner for a leaky valve cover, a zinc booster for an old flat-tappet motor). Read the label and don't stack additives on top of additives. If your engine needs four bottles to run right, the engine needs work.

Oil Additive

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Top brands making oil additive