Theres a few disadvatages to mr9 its highly oxygenated which is great for race purposes only but to the average joe its sucks because you cant leave it in your tank for a long time beacause it loses oxygen thats why its such a low octane because it burns so much cleaner with the extra oxygen in the fuel, and it will make your engine run on the lean side also . and at $15+ a gallon i would stick with the most reputable gas stations highest octane of fuel, but I just love the smell of race gas lol !Ok I looked at the VP website and yes MR9 is leaded which is funny because the yoshi rep said dont run leaded fuel but recommended MR9 also MR9 is 87 octane I think I will just stick with the highest grade of pump gas. :shock:
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