The 6.2 and 7.3 in a F-350 crew srw 4x4. How they pull, mileage, quirks, hints. Bossman won't dump anymore money on the '08 6.4 and is looking at gassers. The 6.4 soured him on diesels.... I live on the flats and the heaviest trailer is a 24' gooseneck stuffed with 1000 pound steers, 70 miles to the sale barn. Most miles are hiway and ranch.