Racing fuel MS109X is an unleaded racing fuel, MTBE/ETBE free. it is highly oxygenated racing fuel. MS109X makes up to 5% more power and torque than any pump unleaded fuel. It can only be used in fuel systems designed for unleaded oxygenated fuel. Because it is highly oxygenated and requires more fuel flow compared to conventional pump unleaded fuels. The product includes corrosion inhibitors and valve seat recession additives.
MS109X fuel requires a specific tune.
Specific Gravity = 0.793
RON = 109
MON = 98
(R+M)/2 = 103