Quote:
Originally Posted by wheelpro
Bpc replied
We recommend the 10w60 because in the builds the ring gaps are different, you are going from an alusil liner to a steel sleeve and the bearings a slightly different than factory. It requires a different oil to help control blow by and keep everything properly lubricated.
This is correct for stock S63's. Your S63 is now a fully built motor and this information does not apply, because the motor is built it has different tolerances than stock.
The clearances should be the same.
Thats all  |
That is the best way to find the answer, get ahold of the engine builder.
Glad to see your engine come back to life.