Subaru Forester Turbo Oil (EJ205 WRX Engine).

BDK

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Do I compare Noack & HTHS to determine what oil is best? For example the 5w40 Fuchs Titan Race Pro S has Noack - 6.6%; HTHS - 4.2 I haven't seen anything better than this so does this mean it's the best 5w40 oil available?
 
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Originally Posted by BDK
Do I compare Noack & HTHS to determine what oil is best? For example the 5w40 Fuchs Titan Race Pro S has Noack - 6.6%; HTHS - 4.2 I haven't seen anything better than this so does this mean it's the best 5w40 oil available?
Yes and no, just use the Fuchs you will be happy. I prefer 5w or 10w for turbo.
 
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