Quote:
Originally Posted by cfg83
FunkSkunk -
I have a ScanGauge I. I set the engine to 1.9 Liters, the speed to +2% for my tire/odometer calibration, and the tank to 11 gallons.
I don't use the tank-to-tank fuel calibration function because I don't want to do the fill-up-to-the-top and then drive till it's at E or on fumes. I always fill from 1/4 to 3/4 full, which is about 5.5 gallons. For this reason, my day-to-day current MPG is only a *relative* barometer of MPG for me.
... CarloSW2
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I'll suggest a compromise that should give you a way to calibrate the SG without running the tank down to E.
The point of the calibration process is to have the car burn enough fuel in one fill cycle so that it's averaging enough data together to get a good representation of driving patterns. Can you do this:
Fill till the handle clicks off. I don't recommend filling till it spills over out of the fill pipe and I don't think the SG manual recommends that either. Enter the fillup into the SG but - as the manual says for the first fillup - don't enter any correction. Just leave the "gallons" number as the SG shows it, regardless of error. Then drive as much as you're willing to. Maybe down to 1/4 tank or 1/8 tank. You don't have to take it to E. I don't like going to E either, myself. After this 2nd fillup (again till it clicks off, like the first time), enter the correction as the manual describes. If it thought you were going to need 9.6 gal. and you used 10.1 gallons, adjust it up so it says 10.1. You're done. That's the correction. Be sure to hit "Done" and "Save" so your correction is stored.
Do beware of any stupid silly readouts from the SG. I think the data in mine gets corrupted sometimes. Now and then it will say that I've driven thousands of miles in a half day or so, or have gotten ridiculously high or low mpg. When that happens I ignore the data for that tank.