Originally Posted by racin4ds
This should be a HORSE of an engine. Fords V10 was only a 6.8L mill if I recall. The Biggest gas truck engine to date was the GM 8.1L I just don't see the need for such a large gas engine that will undoubtedly get horrible economy. Why not just buy a diesel if you require this much towing capability?
My notoriously hated 05 PSD with the 6.0 averaged 15-16-mpg loaded to the gills hauling a 3 horse trailer with living quarters, 3 fat mares, tons of excess junk and other items when we moved from WV to Florida, over 975 miles.
Not everyone hauls 20k lbs every day. A more powerful gasser is the ticket. The operating cost are much higher for a diesel. Back when diesel was cheaper than gas you may have made the numbers work. Now diesel is $.60-.80 higher than gas. Never mind DEF, particulate filters, and all the other nonsense on diesels now.
I also had a 6.0. It was used to pull duel tandam 20k trailers every day. It got less than 10 mpgs pulling a load. I'm going to question your loaded mpg numbers.