Just my $0.02, I always do a halfway calibration. For instance, with nice round numbers, if UG says I used 10 gallons but I pumped 11 gallons in on my fill, I'll set the calibration with 10.5 gallons used, and continue to refine it as time goes on and more tanks go in. Helps eliminate wild variations.
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'97 Honda Civic DX Coupe 5MT - dead 2/23
'00 Echo - dead 2/17
'14 Chrysler Town + Country - My DD, for now
'67 Mustang Convertible - gone 1/17
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