Patman
Staff member
39 MPG!! I had the cruise control set to 60 MPH and was running in pure V8 mode (this car has the ability to run on 4 cylinders at light throttle) I had filled up with Sunoco 93 in Niagara Falls NY, and that has 10% ethanol in it. When I fill up in Ontario I have been running Costco or Shell 91 octane, both of which have no ethanol. I have heard that ethanol free gas is worth about a 3% bump in MPG, so I'm going to try that same stretch of road later on when I have a tank of ethanol free in it, and I should be able to crack 40 MPG! And running it in 4 cylinder mode is worth about another 5% improvement so I could possibly see 42 out of this car! Not bad for 455hp!
(as a side note, I'd better go for my 40 MPG run before I switch this engine over to M1 5w30 ESP, as it could give me a slight decrease in MPG with it's higher HTHS)