Best Oil Additive. Can Forms High load-bearing film of lubricant on all friction surfaces. Mileage age heat and pressure can cause engine gaskets o-rings and other seals to shrink harden or dry up.
We are not sure how it will perform but it enjoys an outstanding reputation. ZMax 55-032 Multi-Purpose Additive 32 oz. Marvel Mystery Oil 3.
Top 3 Oil Stop Leak Additives.
An stop leak additive is a non-solvent chemical formula containing a blend of friction modifiers and other refined petroleum products. This revolutionary engine oil additive is made in the USA and contains scientifically backed synthetic oil nanoparticles to boost engine performance. Aftermarket oil additives for old engines are typically made from a SAE 50 base oil. Marvel Mystery Oil MMO has a high amount of solvency to help remove engine sludge and free oil passages.