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Old 02-24-2019, 05:28 PM   #1 (permalink)
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Join Date: Mar 2018
Location: Texas
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mpg inconsistencies

Story time so I drove home and back around 8 hours and of course tracked the mpg. according to the scangauge e (which has been fairly accurate thus far) I got 44.5mpg driving home, then got 45.1 on the drive back until i ran out. This seemed to be about right with all the slow driving and occasional drafting. However on the fill up the mpg was only at 40.2 total for the tank. 444.5 miles put in 11.1 gal.

Seemed far too low for all highway so I kept going, on the last hour of the drive I drove a bit more spirited/ sped more and averaged 36.9 (according to the gauge) fair enough. But upon filling up it said my avg was 41.2 which has me baffled. 55.2 miles then putting back in 1.34 until it clicked.

Anyone have any similar experiences or can explain it because I am confused to no end haha. The first run I got some cheap gas so was thinking perhaps that could've caused the mpg to be lower than normal but that doesnt explain why the last fill up it was higher.

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