Unleaded fuel is best for O2 and cat life. I ran Octanium before, it works but its hard on O2 sensors. I tried Boostane and I honestly run it in every car I own. It's incredible. So far, spark plugs, o2 sensors, all good. Many of my employees run it when they go to the track, it really helps us pump gas guys. 93 is so much better than 91 octane, we find it to be a net difference of 4deg of timing in general. If you run 1/2 a can of Professional boostane per full tank, a 91 octane customer will hold 2-4 deg's more timing at WOT nearly every run. We don't have nearly as much experience with it on 93, but on 91, its big for the simplicity of it.Should you only run unleaded 100 octane race fuel and do you recommend using VP Racing Octanium for your Whipple Tune on the stage 2 kits?
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