VP Racing Motorsport 109E (MS109E) Race Fuel is designed for the same applications as Motorsport 109 REG, offering the same substantial power increases and protections against detonation. Oxygenated with ethanol, MS109E can be used in all 50 states, including those that restrict the use of MTBE in fuels. R+M/2 (Octane): 103.5. Color: Yellow. Oxygenated. MON: 99. RON: 108. RVP: 8.43. Specific Gravity: 0.805. Fuel Type: Unleaded.