[SP01715]

Originally Posted by SP01715

I blend about 3 gallons F&L 111 to 10 gallons 91 pump gas. I played around with ratios, and this works well for me. I used straight 111 and the car ran like crap on the top end. I talked with Roush and they said to decrease the octane, and it ran fine. I was getting a little run on with straight 91, which went away with the blend.

10-1, and yes it works well. With straight 111 it felt like the limiter kicking in over 5000 rpm. At first I was thinking there was another problem. I talked to Roush and they asked what octane I was running. I told them 111 and they said to just use premium pump gas. Premium gas here in CA is only 91 (some states are 93) so I wanted to bump the octane a bit. The easiest race gas for me to buy here is 111 (I can get it straight from the pump). I started playing with ratios, and the above seems to work best. No run on on shut down and runs perfect on the top end.