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Do the diging , to find the rpm sweet spot. This will change based on truck configurations. Eg 58-62 for slowmover with a 3.55 ×.75 Od 2.6625 final Vs my 62 -70 3.55× .69OD 2.4495 final. Your rubber gear (larger/smaller tires) changes will move the sweet spot as well.
Rout segregation
Leave I5 at weed on97 this is better terrain fewer shallower grade / passes. Both UP and BNSF Railroads have abandoned the I5 cordor from weed,Ca to Eugene ,Or the Siskiyou mountains infavor of the Cascade range(extra100mi). For a savings of 500ga per train , and 2000Tons higher tow limit(4200T Vs6400T). I 5 WAS SLATED TO RUN WERE 97 IS. But cost to get between the east side of Klamath lake, the RR and shifty volcanic mountain was too high. And the west side (Westside Road from hwy 140 to Chiloquin /fort Klamath) is a snw belt.
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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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