If you want to save money ,run avation gace. many people are stuck on being ripped off for race fuel.I run av gas for two years in my shee even up to 210 lbs compression and no problems.Its probally running about $3,00 a gallon now. The air port calls it 100 low lead,but thats designed for high altitude.They tell me its more like 110 octane on the ground.Many car drag racers use it in there big block motors that cost alot more cash than our shees.