Quote:
Originally Posted by JQmile
Anyhow, was crusing at 65mph or so with the window down, no aeromods, and a rocking chair and table in the bed (not so good for aero). It got 26mpg, backed up by 24mpg at 70-75mph next fillup. I think I could break 30mpg if I drove 55, the EGT gauge only reads 400 deg at that speed.
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Maybe, maybe not. It depends on engine efficiency versus gearing. If your truck's engine drops out of a favorable part of it's BSFC map going from 65mph to 55mph then you won't see much of an increase.