I get about 22-23 mpg at best. I just don't drive much except to work, which is 50-60mph for 45-50 minutes only 4 days a week, 30 miles or so each way. So I put 250 or so miles per week. Ends up being about 11 gallons of 87 octane at $1.75/gallon.

If it's any consolation, I also am adding 2-stroke oil, about 8 ounces each time I fill up. That's about $0.50 or so extra (: