Mark 1: 101 Octane
- Showroom stock racing
- Endurance racing
- Tested at 12:1
Mark 2: 110 Octane
- 2 Stroke
- 4 Stroke
- High compression
- High RPM engines
- Tested at14:1 – 4 Stroke
- Tested at 15:1 – 2 Stroke
Mark 3: 110 Octane
- Cold weather motorsports
- Snowmobile racing
Mark 4: 112 Octane
- High compression ratio engines
- Tested at 15:1
Mark 5: 114 Octane
- Ultra-high compression ratio engines
- Tested at 16.3:1
Mark 6:
- Ultra-high compression ratio engines
- Tested at 16.3:1 Plus Nitrous
- Tested at 40PSI Turbo boost
Methanol:
- A1
- Legal 99.9 % Pure Racing Methanol
GT98: 98 Octane
- Tested up to 11:1