Ahh ... from Norris to Cinci .... well I do that in the Summer and keep going to C'Bus up I-71 .... the Ford Expedition towing the 214 and our vacation goodies is in the 13-14 mpg with the 5.4 V8 .... 10 does not seem out of line ..... it is a hilly a tow .... I tend to NOT use OD so the truck tranny does not hunt .... in the flats I do allow OD to do its thing.
Make sure your tire pressures are good especially this time of year with cooler temps.
Keep a tight line, and a smile on your face. Peace out.
2008 Prostar 214 MCX
Previous 93 Prostar 190 1.5:1 GT40
"Left Foot Forward and preferring girls."