Fuel Economy & Emissions Talk about the mileage database, EPA, hypermiling, gas and driving strategy.

I've confused myself calc'ing my last tank :(

  #11  
Old 07-01-2005, 04:54 AM
Have hybrid, will travel.
Join Date: May 2005
Location: Stockton, NJ
Posts: 467
Default Re: I've confused myself calc'ing my last tank :(

Xcel's point is good. If you record your mileage and record the gallons, the error caused by mis-fills, partial-fills, and over-fills goes away over the lifetime of the car.
 
  #12  
Old 09-23-2007, 11:10 AM
Enthusiast
Join Date: Jul 2007
Posts: 4
Default Re: I've confused myself calc'ing my last tank :(

Most pumps will print a receipt that shows the purchase in gallons to three decimal places,
or about 1/15 oz. You can do as many partial fills as you like if you keep track of what went in between fillups. The higher the total gallons, the smaller (percentage wise) the uncertainty
due to the variation in the volume in a "full" tank. I just did a 26 gal calculation on an insight (10.5 gallon tank) and the results agreed with the fcd within 0.2mpg.
 
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