Worked on an absolute jewel of a pickup last week. 22 or 23 6.4 Hemi equipped 3500 crew long bed single wheel with the available 50 gal gas tank and 4.10 gear! Honestly in talking with the customer his mpg wasn’t much worse than my 17 Ram 3500 CTD. He weighed 23k gross. The only thing I miss about my 01 is the fact it was paid off. The 17 is so much more relaxing to drive.