[Whipple]

Originally Posted by RagtagXMASTER

The 5w-50 does combat the high oil temp problem and that is a good thing, the downside is it takes longer to warm up.

it is beneficial to overall longevity. my liqui moly molygen 5w-40 thins out to a 30 weight oil after having it sent to blackstone for a test.

The catch cans dont really do much on these cars, i have never seen any of them catch a drop of oil.

here are the links from FCP for the replacement PCVs

https://www.fcpeuro.com/products/bmw...-4-11157843150

https://www.fcpeuro.com/products/bmw...-8-11157843151

I never switched to the redline 5w50 myself,I know the guy Troyup says its good ,but know else recommends it ,no other shops I found recommend it ,the bottle doesnt have the LL-01 that our engines need either,I stayed away ,Im sure it helps with heat but by how much? there is a lot of other moving parts in the engine that might need that slightly thinner oil to lubricate.

I contacted a guy that owns a shop in the UK and his M5 is at 1000hp stage 2 turbo upgrade and meth injection and full strengthened drive trane ,all stock internals I asked him what oil they use over there and they said 5W40.

If someone can prove a night and day oil analysis I might consider it.
For now I will stick with Molygen and change it more frequently 2-3k tops