We have a 37' 2018 Miramar and the worst MPG I've had so far was 6.5MPG towing a 4 door Wrangler. I was driving faster than I normally do on that trip (70-75mph). The best MPG I have gotten so far was 8.1MPG and that was running about 62-65MPH also towing the jeep. I received the motorhome with 1100 miles so the engine might just need to loosen up a bit after breakin.
Burch
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