Forum Discussion
Hannibal
Jun 01, 2019Explorer
Thanks for posting this Groover. I find these honest comparisons interesting as I did the same when I went from a 2003 Cummins powered 2500HD Ram to a duplicate Hemi powered 2500HD towing the same 10,400 lb 5th wheel. The diesel gave 2~mpg better towing the same speeds and routes and 5~mpg better city empty. The 5.7L Hemi actually towed faster up those 3~* rolling hills around the southeast but at 30% higher rpm. Gear reduction is a wonderful torque multiplier but most folks erroneously believe higher rpm hurts an engine. Gear reduction and higher rpm actually allows an engine to run cooler and easier. Not harder.
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