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
I'll save you the trouble:
https://www.youtube.com/watch?v=8uIsbRaArvk&feature=youtu.be&t=695
https://www.youtube.com/watch?v=8uIsbRaArvk&feature=youtu.be&t=695
