I just drove a Ford V10 van with a 16' box trailer with not too much inside from Long Beach up to Richmond CA. Started with 1/2 tank, 93 miles later I was at Tejon pass with less than an 1/8 tank. A god awful drone from 30-50mph. Only able to hold 45 in 3rd going up the grapevine, it was able to make it to 4th only to down shift again. Mean while a 3rd gen dually flew by me with a burly flatbed and two cars. The day before I drove my truck from Richmond to Santa Cruz over highway 17 with a 27 sailboat in tow. I am glad I have Cummins.