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Old 08-24-2016, 01:12 AM   #1 (permalink)
19bonestock88
Master EcoModder
 
Join Date: Jun 2016
Location: WV
Posts: 1,189

IGL - '04 Saturn Ion
Team Saturn
90 day: 56.19 mpg (US)

grayOS (personal use) - '19 Mitsubishi Outlander Sport ES
90 day: 30.71 mpg (US)
Thanks: 55
Thanked 285 Times in 220 Posts
UltraGauge FE calibration?

So, I just had some great insight into the inaccuracy of my UltraGauge in its current form, it appears optimistic... Today I found myself on the Ohio highways on a 680 mile round trip, and since it's flat there, I was getting some pretty friggin awesome mileage for what my car is... I filled up in Sylvania, and drove toward home, and stopped at the last cheap fuel station on the way back, about 65 miles out. This was done in two trips the UG recorded, one trip averaging 44.0mpg indicated, and the other averaging just over 42 indicated... So, had the UG not reset during the time we stopped for food(I kept it running during bathroom stops), it would have shown an average somewhere around 43mpg... When I filled up, the actual mileage was like 38.7mpg... Given that the UG is reading 10-15% optimistic, what's the best method of getting it to report numbers closer to actual mileage? It doesn't need to be 100% accurate, but 10-15% error definitely gives me a false sense of achievement...

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