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i have noticed the exact same thing, i get the same octane gas from the same gas station every single time, it seems to have more pick up. not racing it up at all... not spinning before or after, i RARELY ever spin my tires, trieng to make whats left last til i can put the rims on. so more traction, better fuel/octane, non of that would do it for me, but it seems to have a bit more pep on a full tank. no doubt. its noticeable.