Penn Grade (Brad Penn) oil

My brother uses Penn in the Cosworth DFV engines he builds for the vintage Formula 1 cars. And in the other motors. These are spun up to 10k for about 20 hours before a rebuild. (Which you don’t even want to know how much that costs.) when the motors are torn down, most of the time the bearing look brand new. He’s got one in the dyno today. Cosworth BDA which is a 1600, 16 valve twin cam, makes 152 foot pounds and 248 HP. Which is 97ci. So pumping out 2.55 hp per inch. All trusted to 9 dollar a quart Penn grade. And Sometimes to Driven.