Quote:
Originally Posted by Blue By You
Quote:
Originally Posted by edycol
If you are not tracking your car, Castrol 0W30 is all you need.
Remember: as thin as possible, as thick as necessary!
0W30 will create bit less heat than 0W40 (two comparable Castrol's). This 0W30 (in Europe originally called SLX) was initial fill on Audi S4 and RS4. HTHS of 3.58 but KV100 11.6. You can't get better than that.
What matters in your tuned engine is oil temperature! That is it. What temperature you are running?
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Right now stock and running right around 200-206F. Have not tuned yet so no idea of if/how that might change the temp. But it would only be a Stage I tune if I did it.
I really like that Xcess gen2 you turned me on to. the 40V and 100V are both high (you want it high right? with 3.8 HTHS. |
200-206f? That is really low! I think BMW does that to cool off engine as much as possible. It is really not good as oil temperature should always be above 212f. But, I think BMW does it to prevent failures known on N/S63.
It this case you really want XW30 oil when not on track. I personally would go this Castrol 0W30.
You want HTHS in 3.5-4cp range (on track possibly minimum 3.6). With that HTHS you want as low as possible KV100. Hypothetically, KV100 14.2 and HTHS 3.7 are average values. KV100 13.1 and HTHS 3.7 are really good values. You see where I am getting to?