I should sa Specialty Racing Oil.
I don"t know the detergent levels of the VR-1 racing oil.
Valvoline® Specialty Racing Oil ("Not Street Legal")
The low-detergent, high zinc racing oil optimized for track-use only, delivers increased horspower and extreme wear protection
•High zinc/phosphorus provides extreme wear protection, including flat tappet applications
•Low detergent formula to deliver maximum horsepower on the track
•Recommended for race engines only
•Compatible with gasoline or alcohol fuels
•Available by request through NAPA, Carquest, O"Reilly, Jeg"s and performance shops served by Keystone Automotive