[HarryD]

Originally Posted by shawn908

FYI - here is one where there is a specific pitch on the website for use in air cooled Porsche engines. FWIW this product was recommended by a Porsche shop about 40 miles from Philly when the local PCA club held a meeting at the shop. I've been drinking the Brad Penn koolaid...so no direct experience with Joe Gibbs.

https://lnengineering.com/joe-gibbs-racing-dt50-full-synthetic-15w50-aircooled-engine-oil-12-quarts.html

The Joe Gibbs product seems to be very good. That said, I have been using BP almost since I got my car in 2002. I had to get a top end done to my car about 1-2 years ago with 160,000 miles. when the motor was apart, other than the damage to my piton and head due to a screw getting into it, the internals looked excellent and minimal evidence of wear. To me, anyway, BP 20W-50 looks to be the correct product for my use.