A friend of mine recently bought a '12 5.0 Mustang. It has the 6 speed manual and 3.73 gears. He is getting around 22 mpg, but was hoping to be closer to the 26 mark. I would like to hear about anyones experience with the same set up with the 3.31 or or 3.55 gears. I told him it is all about the "smiles per gallon" but he wasn't buying it.