Gyro Gearloose Compares Shell To Off Brand Gasoline
This guy goes through a lot of work and you can decide how valid it is https://www.youtube.com/watch?v=8uIsbRaArvk
Forum Discussion
A performance/dyno tuning shop owner in the city down the road 3 hours was on a radio talk program about gasoline. He had a customer bring in a Corvette. Dyno power down below spec. Pumped discount seller “premium” out of the tank. Put in some V-Power. Dyno output returned to Chevrolet spec. The customer had his removed gas tested to find out it was 87 regular. But it was cheaper....
