I keep trying to figure out my flaky fuel gage. I can't seem to find any consistencies with when/if the fuel gage will show close to true at the end of a tank. Sometimes I'll be turning 550+ miles on a tank when the add fuel warning goes off and sometimes I'll only be at 400. I keep trying to relate the behavior to temperature, driving conditions, and phase of the moon, but I just can't seem to draw a correlation. I agree with JeromeP that the gas gauge is certainly not linear. I generally hit 130 - 150 miles on the tank before the first pip disappears. By 1/2 tank the pips have aligned to about 55 miles per pip and continues that way through the last 3 where I tend to either get huge mileage on the 7th pip or a rapid progression to empty.

Maybe what we need to do is start gauging how much fuel is being consumed per pip in our vehicles. Maybe we can get a few volunteers living in metro areas, where there are gas stations on every corner, to start mapping pips to fuel volume. I propose filling from the different pips 3x to look for consistency. Start with 1 and work your way down. Anyone else have an opinion on what other data we should keep beyond gallons and miles? How about ambient temp?

2004 Toyota Prius
Package #9, Millenium Silver
"Boo"

Mods: Always-hot Accessory Port, Rockford Fosgate DMP1 60GB MP3 Player
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