Towing most everybody gets 10 to 12 mpg. Personally I average 11.5 over several hundred miles pulling
Word to the wise since you indicated you didn't want a dually but your FW is going to be on the larger side. That combination doesn't work very well depending on your definition of "larger side". 3/4 truck generally stay below a 12k# GVWR FW and 1 ton single rear wheel generally stay below 14#k GVWR FW. Note those numbers are GVWR of the FW not and I repeat not the manufacturers listed dry wieght. If your thinking greater than 16k# GVWR FW you will have to have a dually.
