Quote:
Originally Posted by 3Ddesigns911
Hey Steve,
I just looked up the B-P 15w40 racing oil and it is partial synthetic... they also have a 15w40 dino for diesel.
Are you guys switching to the part synthetic after the first few hours of dino already?
Thx
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The 'partial synthetic' labeling is political and the result of an FTC ruling.
Generally speaking, its meaningless in the real world.
Diesel oils are for diesel engines which have totally different operating conditions than gasoline engines. Further, the EPA has mandated similar reductions in ZDDP for diesel oils and should not be used in a 911 engine.
As I noted, we start each & every newly built engine using Brad-Penn Break-in oil (on our engine dyno), run it for a few hours during camshaft break-in and ring seating. After that is done, we change over to the regular Brad-Penn 15w-40 racing oil and finish tuning as needed. Its what goes in the engine after re-installation back into the car.