I've only had mine for 1000 miles or so, but I'm getting 14.2-14.5mpg around town if I keep my foot out of it. I've towed my 24x8.5 box trailer with it around town, and still got 12.5mpg.
I haven't been on the highway much without a trailer yet, though with my boat behind it (24' bowrider) on the highway I get about 11.5mpg at 75mph. With the wakeboard tower and bimini frame though that thing is terrible from an aero perspective. I expect to do much better with the box trailer on the highway.
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