overhead mpg
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Junior User
Joined: Oct 2007
Posts: 79
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From: Vancouver Island
overhead mpg
I've never done a long hand calculation to compare with the "lie a meter" as many refer to it. Is the overhead generally less or more than a calculated figure? Or just incorrect either side? I've never seen mine over 12.2mpg, even on the highway.
Fleet Owner
Joined: Nov 2003
Posts: 27,881
Likes: 3,595
For my truck, my hand calculation is always .5 to 1.5 mpg LESS than the electronic. It does differ from truck-to-truck though. Some say theirs is accurate. The big differences occur when the truck is modded w/ different diameter tires/rims and not reprogrammed for the change.
