i changed my oil about 600mi ago with 5 30 shell rottela and i hate it i hear everticktock and tap. does anyone see any probs with 10 40 royalpurp. also when i take my oil cap off i see a yellow sludge, is there and aditive i can use to clean it up. thanks

 

what you need to do is get a flush at the local shop, it is like 40 dollars or less. Then i go with 5w-40 when i change it any time and i use amsoil. never had a problem with it at all.

 

Mobile 1 0w40 euro blend ftw.

 

correct me if i am wrong but a thicker oil silences engine noise. like 5 30 is thinner than 10 30..

 

I'm with TKneeds, 0w40 Mobil 1 is the way to go.

The turbo oil inlets are a known flaw in the S4...they're too small. I'd recommend a lighter weight oil unless you live in Phoenix or somewhere else where it's like 120 degrees. If you live anywhere with cooler temperatures, go with the 0w40.

Just my .02

 

good post i wondered what people were usingtoo

 

Mobil 1 0W-40 or Castrol Syntec 5W-40 is what I use

 

thicker oil does not quite sounds....and on a turbo car, you are better off with a lighter oil since it will recirculate to the turbos more easily, and will cool off faster, with less build up....prolonging engine life