Maxlife synthetic and old engine

[chromatin]

Well, it is supposed to use in old engine and fix some small leaks. But lots of people mentioned that it's a group IV, which might cause leaks in old engine. How does valvoline solve this problem?

 

[Buford T. Justice]

How would a change in motor oil fix leaks? It won't. MaxLife will help recondition seals to help prevent burning oil, but not leaks.

 

[HardbodyLoyalist]

Well, wait a minute. Reconditioning seals would presumably include the rear main seal, would it not?

 

[youngbuck]

I thought about this when Maxlife Syn first came out, and I figured that they wouldn't advertise it as Maxlife if it would make a small leak bigger like happens in some cases with a regular synthetic. I doubt there's anything to worry about.

 

[kendogg441]

Wait, maxlife syn is a group 4? I didn't know that, lol. What is M1 EP, isn't that a group 3?