PENN GRADE 1, 71196, Synthetic Blend High Performance Oil SAE 20W-50, 1 Quart

Fair price and quick delivery. I was down to last 4 in my case and needed 1 more. Recommended by my engineer builder for my c3 corvette, pulling 387 hp on dyno. Ran it 3 years now with no issues so I’ll stay with it!

I have two 575 blower motors that I run only this oil in. The guy who rebuilt my motors highly recommended this to me and I have been running this for 5 years now

Only oil I use in my classic ferraris, Jags and MGs

Only oil to use in an antique car. Oil with zinc.

Won't use anything else in my aircooled engines.

As of December 2008, Brad Penn oils were still being manufactured to the old API-SF and ILSAC GF-2 standards with a full .140% Zinc and .130% phosphorous needed by older engines with flat (non-roller) tappets, such as MG, Porsche, Maserati, Ferarri, and most small and big block GM and Fords. These are a great low-cost alternatives to aftermarket synthetic oils being marketed for flat tappet engines (e.g. Royal Purple). Not for use in late model cars with 100,000 mile warranties on the converter, but necessary to avoid early cam/lifter failures on flat tappet cars. Hoorah for Brad Penn.

Brad Penn oil has the anti ware additives suited to air/oil cooled classic Porsche engines. Most classic Porsche owners do their home work and research the products used in their well cared for cars. After much study my choose is Brad Penn motor oil for my 1979 SC Porsche.Tsunamiboy

I've used Brad-Penn 20-50 in my 1973 Porsche 911T forever. It's high in zinc that my engine needs. My car loves this oil.