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Re: Cummin 12 valve Square Body Suburban MPG?
My P-pump 24v 5.9 Cummins in my 72 Longhorn gets 16.5 in town. The truck weighs 7200lbs with me in it and it has huge injectors and 2 turbos. Driving normal with some skinny pedal action, it gets 16.5. Highway it gets 18-20. Most swaps I've done a 12v will get 18 plus. I did a yellow square body 4x4 burb that was on 35s, had 3.54s and it got 18 or better on the highway. It got 12mpg pulling a 10k dump trailer loaded with rock at interstate speed.
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Ryan
1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 GMC Sierra Grande Longhorn 4x4
1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed
1972 C10 Suburban Custom Deluxe
1969 Chevy milk truck
1971 Camaro RS 5.3 BTR STG3 Cam Super T10
1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project
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