What would make the most power is the simple question, lets say both ST's have the exact same mods, stage 3, E30 vs a 93/100+ mixture like turbo blue or something like that. Around where i live i can only get 110 octane turbo blue from a valero about 30 miles away from an actual pump. So for ****s n gigs lets say E30 (3 gallons of E30 and rest 93 full tank) vs 3 gallons of 110 and rest 93? anyone even done a high octane tune? i know the E30 is way more popular because of ease of it at the pump, and the availability of 110 isnt a regular thing, on top of the $8 a gallon price tag.