I was coming back from the bay area in California the other day on 680 and I had to stop and get so gas in my car. When I saw this little gas station tuck away off of 680. Then I noticed that they had two pumps right side be side each other. one pump was Reg 87 Octane, Mid grade 89 octane, and premium at 91 octane. Then the next set of pumps were unleaded racing fuel. Their Regular was 94 octane, mid grade was 96 octane, then they had 98 octane and 101 octane. It's right from the pump also, which is cool. But I was thinking about running some 94 unleaded octane in my Bobber. Would it hurt it, or should I just stay with 91 octane?