If I put Sunnoco Ultra 94 in my car with an octane booster (from Gunk or other)I get about 22-24 MPG on the highway. If I put in Sunnoco 93 (straight)I only get about 19 or 20. Also, you should remember that the 289 Mustangs were meant to run 94 or better. (See the owners manual). Going lower can lead to slight overheating and strain.
As for the other ideas on the adding MPG thing. YEAH, putting a new gear in your rear end would help out. Also, electronic ignition does too. In fact, it is a generally good thing to do anyhow. Much more dependable and adjustable. K+N air filters are what I go for also...
|