We have a 2001 with the 8.1 and it does a good job of pulling our 13,500 lb. trailer but doesn't have the power of the new diesels. If I did lots and lots of mountain towing I might consider a diesel. As far a mileage goes, after 178,000 miles I can honestly report 7.9 towing, without the trailer 12 city/hwy and 14-15 hwy
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