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Old 07-18-2017, 09:27 PM   #3 (permalink)
gumby79
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Join Date: Dec 2014
Location: Butte, Montana
Posts: 725

little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
90 day: 23.4 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 2×4 AUTO
Pickups
Team Cummins
90 day: 18.5 mpg (US)

The Salted Hound Jenny. - '87 Dodge Ram 50/D-50 5sp 4X4
90 day: 20.24 mpg (US)

Jona Allison aero - '91 Dodge Ram D-250 Le
90 day: 20.76 mpg (US)
Thanks: 208
Thanked 427 Times in 278 Posts
Bigest question is are you going to be in snow country during winter?
Then 4x4 is good for DD. For interstate towing chains are required for towing. 2or 4wd don't mater.
Installing the free spin kit, like Skyking did ,will help with rolling resistance 5%@70 but dose nothing for the "tall truck" aero penalties 95% @70 (he saw a cupola mpg improvement) .. if this will be a highway only setup(4x4 is for snow/muck only) then consider lowering. You can maintain your tow capacity with airbags /solid /overload springs . Drop it as low as possible. With my 91 D250 1wd eaves a lot to be desired on ice. Underway it sticks to the ice vary well, geting moving now thats the sore spot, Ive had to put on chains to get out of a flat(albeit 6" of crusty frozen snow) parking spot.
__________________
1st gen cummins 91.5 dodge d250 ,HX35W/12/6 QSV
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 31.32mpg 100mi 3.193 USG 5/2/20


Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg


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