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Best Oil to run w a K04

MrFancypants

Autocross Champion
I’d wager that anything with the VW certification would be perfectly safe. It is a stock turbo for multiple other VAG cars.
 

GolNat

Autocross Champion
They run a little hot with a K04. I run a full synthetic 5W-40.
 

Thumper

Autocross Newbie
That is a diesel oil, not the right weight/viscosity (should be 0-40, 5-40, or 5-30) and most importantly I am 99.99999% sure it does not carry the 502/504 VW spec. The specifications are not just random, they represent additives required based on manufacture designs and engine performance. The conditions inside a Cummins diesel vary vastly from those inside the VW 2.0L gasser.

As mentioned the K04 is a stock turbo for other VAG vehicles so anything with the VW 502/504 spec will be just fine. Going with a 0-40 or 5-40 would be best as GolNat stated due to higher pressures and heat.
 
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