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Old 01-09-2013, 01:39 AM
mikennrg mikennrg is offline
Dodge Ram Forum Senior Member
Join Date: Nov 2011
Age: 32
Posts: 355
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Vehicle: 2012 RCSB Express
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mikennrg will become famous soon enough

Aerodynamics will have a bigger effect on highway MPG than any other mods you can do. Things like bed covers, mirror deletes, blocking off more grill, aero under trays, reducing ride height, reducing wheel well gap are all drops of rain. But many drops of rain can result in a puddle.

Guys are noticing MPG increases from the Diablo and Bullydog tuner. I think the added power makes it easier for the truck to stay in MDS mode. Eliminating the clutch driven fan while adding a 180 thermostat then setting the e fan temp to 200 degrees can help on the highway. If you're not running A/C the fan will never come on while moving.
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