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Old 09-11-2018, 09:03 AM   #6 (permalink)
slowmover
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Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,442

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
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Engine idle has to take into account prolonged periods. Above five minutes. After which engine rpm needs to be raised to raise oil pressure to near-normal. That’s where one measures fuel consumption at idle.

The diesel Ford will be closer to 1.0/gl-hr. Which should be the conservative number for planning.

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