ProDriver Fuels are designed specifically for competition. They differ from their RACE Gen2 counterparts of the same nitromethane percentage by 2% less total lubrication. Before RACE fuels were re-engineered with the new Gen2 lubrication package, our ProDriver Fuels were reserved only for our Factory Team Drivers and were not available to the general modeling public. The new Gen2 lubrication package offers such an improvement in protection that with the introduction of the Gen2 line, we also made the lower oil content ProDriver blends available to all our dealers. Care should still be taken in tuning with the ProDriver Fuels. After finding your maximum power needle valve setting, always richen the engine from that setting to prevent overly lean runs