Since installing a new fuel sending unit last year, I have been trying to "rate" the fuel gauge - seeking to get fuel readings at each demarcation. Finally got it done (it is sometimes tough to catch a gas station right when the needle is on the desired mark). The readings actually taken, of course, were the amounts needed to fill the tank from each mark (gallons used).
Anyway, it turned out to be surprisingly consistent. With a full tank having 23.8 U.S. gallons, and with the red warning light coming on at 5.8 gallons remaining, I had hoped the 1/4 tank increments would be 4.5 gallons - and they were, right on the money!
OK, if no pics it didn't happen - so here's my gauge (though the red light shown as a square is actually a triangle - but I had to photoshop it in, so it's a square). The red light reading was taken just after the light came on.
I don't have a good reading for the "R" mark yet, but I am guessing it will come in at about 8 gal. remaining.
I have often thought the gauge was inaccurate - for example, 1/4 tank remaining of a 23.8 gallon tank should result in about 6 gallons remaining - but there are in fact 10.3 remaining. But when you subtract the 5.8 gallon reserve when the red light comes on, and realize that the 1/4 tank increments are apparently indicating the fraction of the 18 gallons available before the light comes on, it makes sense - and is quite accurate.
Some sources I have indicate a 2 gallon reserve when the red light comes on - but mine has been consistent at 5.8 gallons, which is what others report as well.
Anyway, it turned out to be surprisingly consistent. With a full tank having 23.8 U.S. gallons, and with the red warning light coming on at 5.8 gallons remaining, I had hoped the 1/4 tank increments would be 4.5 gallons - and they were, right on the money!
OK, if no pics it didn't happen - so here's my gauge (though the red light shown as a square is actually a triangle - but I had to photoshop it in, so it's a square). The red light reading was taken just after the light came on.
I don't have a good reading for the "R" mark yet, but I am guessing it will come in at about 8 gal. remaining.
I have often thought the gauge was inaccurate - for example, 1/4 tank remaining of a 23.8 gallon tank should result in about 6 gallons remaining - but there are in fact 10.3 remaining. But when you subtract the 5.8 gallon reserve when the red light comes on, and realize that the 1/4 tank increments are apparently indicating the fraction of the 18 gallons available before the light comes on, it makes sense - and is quite accurate.
Some sources I have indicate a 2 gallon reserve when the red light comes on - but mine has been consistent at 5.8 gallons, which is what others report as well.
Added 07/25/2012
