You will have no problem pulling a trailer. My 99 F-350 CC gets 13 and change pretty reliably with the cruise set to 75. I could probably squeeze 14 or so out of it if I wanted to drive slower. Around town I get around 11.5. I don't pull a trailer but I load the thing to the brim with cordwood all the time. The gas mileage does not seem to change too much. Hope this helps...Phil

99 F-350 CC LB V10 Lariat 4x4 SRW