Also which one is better to buy? Razor can you shed some light??
M1™
M1 Racing Methanol has a 99.95% minimum purity - the highest purity available in the U.S. With M1, engines run cooler and are less subject to corrosion. VP uses only lined drums which prohibit rust, corrosion and metal deposits that can contaminate fuel delivery systems. Recommended for all methanol-legal racing applications.
NEW! M3™
Like M1, M3 Racing Methanol has the highest purity available, but with an extra boost. With special additives, M3 offers a wider range of jetting options, making jetting easier and more consistent. With better tuning and cleaner, more efficient combustion, M3 makes more power than any standard methanol on the market and passes water test as well.
I'm guessing M-1 as M-3 has additives? I never knew buying methanol would be so hard...