Imperial Car Club Forum

It took a while, but I finally found this, looks like it is just fine for oldies!

Since January 8, 2008, Brad Penn� Penn Grade 1� High Performance Oils have been formulated with a typical 1500 ppm zinc and 1340-1400 ppm phosphorous additive concentrates.May 17, 2010

Matt - I'll try some of that next time. Right now I went the expensive route and got the additive instead.