Compare VP race fuels side by side
Pick two or three blends below to see their published specs side by side — the same figures, in the same units, as each blend's own page.
| Spec | VP X98 | VP X85 | VP MS109 REG |
|---|---|---|---|
| RON | 103 | 108 | 111 |
| MON | 120 | 95.2 | 100 |
| (R+M)/2 | >111.5 | 101.6 | 105.5 |
| Specific gravity | 0.7940 (793 kg/m³ at 15 °C) | 0.7800 (779 kg/m³ at 15 °C) | 0.7200 (719 kg/m³ at 15 °C) |
| RVP | 3.04 psi (21.0 kPa) | 4.22 psi (29.1 kPa) | 6.03 psi (41.6 kPa) |
| Oxygen content | 34.73% | 30.03% | 9.32% |
| Fuel type | Ethanol | Ethanol | Unleaded |
| Colour | Colorless | Colorless | Colorless |
| Leaded | No | No | No |
| Oxidation stability | >1440 min | >1440 min | >1440 min |
| Distillation — IBP | 151°F (66.1°C) | 140°F (60.0°C) | 97.7°F (36.5°C) |
| Distillation — 10% | 170.1°F (76.7°C) | 163.4°F (73.0°C) | 138.6°F (59.2°C) |
| Distillation — 50% | 171.3°F (77.4°C) | 170.6°F (77.0°C) | 159.6°F (70.9°C) |
| Distillation — 90% | 171.7°F (77.6°C) | 172°F (77.8°C) | 216.1°F (102.3°C) |
| Distillation — FBP | 178.2°F (81.2°C) | 174.7°F (79.3°C) | 226.6°F (108.1°C) |
| H:C ratio | 3 | 2.85 | 2.32 |
| O:C ratio | 0.5 | 0.4 | 0.09 |
| Stoichiometric A/F ratio | 8.98 | 9.81 | 13.36 |
Typical values as published by VP Racing Fuels.
You're comparing the maximum of three blends. Remove one to add another.