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Old 10-30-2011, 05:14 AM   #17 (permalink)
Arragonis
The PRC.
 
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I solved my original problem, its about the low volumes being used in the calculation. When you have used 1-2 gallons each .1 the SG reports may be .1 above or below, not sure how it rounds to 1 decimal place. But it can make a 5-15% difference in MPG calculations.

As you use more fuel the .1's become less significant.
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