The stock eliminator class finds gains by going to a 0 wt oil with a class match racing and switch back to their regular wt oil for the next round. Unless you are running all out and need every .01 what's the real gain. Once the motor is warm and the oil viscosity has been established, same goes for gear oil, its all about running the # on the windshield and getting as many passes from the motor as possible. Your typical road race car runs 20-50. That's a hell of a lot of engine abuse than any drag motor. That rumor about brad Penn, when the company was sold, they changed packaging and many racers bought the street oil instead of the race oil. Have had no problems with SB or BB builds Everything I race is between 12.50 and 9.90.. In the world of snake oils, oil brands/claims are worse than politics.