Best Oil Additive. The 5 Best Oil Additives Reviewed. And it is recommended to use oil additives once per oil change.
We are not sure how it will perform but it enjoys an outstanding reputation. An stop leak additive is a non-solvent chemical formula containing a blend of friction modifiers and other refined petroleum products. Marvel Mystery Oil MMO has a high amount of solvency to help remove engine sludge and free oil passages.
Our pick for the best oil additive is the Archoil AR9100.
When using a specific oil additive in a new car check the. Lucas oil is made in the United States eliminates dry starts and gives you more power for your MPG. Best Oil Additives for High Mileage Engines Buying Guide. This BestLine oil additive is a synthetic engine oil additive that is marketed as suitable for all gasoline engines.