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Old 04-26-2017, 07:40 AM   #18 (permalink)
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,442

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
Thanks: 1,422
Thanked 731 Times in 553 Posts
Best mpg will be at 60-mph or below. The trucks hit a wall at that speed or higher.

For a highway trip under 300-miles, average speed will be close to speedometer set speed if at 60. Faster one goes, the greater the discrepancy between average (actual) and speedo set speed. No lane changes, no braking, no off throttle to deal with traffic, etc.

This is so up to 62-mph. After that one is mixing with commercial traffic

High mpg is long term discipline. Several hundred thousand miles. The diesel fuel advantage takes just about 200k miles to achieve (over gasser equivalent) in a pickup.

15 is what I average with a 35' travel trailer. It's lousy for a solo truck.

And the engine is a 6.7. Only 6.9 was a 1980s Ford with a Cornbinder oil burner.
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