BRZ MPG Data Analysis

[Stang70Fastback]

If you are doing rolling measurements strung along several back-to-back fill-ups, the errors resulting from discrepancies in the exact amount of fuel you put in pretty much approach zero, though. So luckily you don't have to worry about those errors in your calculations.

[extrashaky]

Originally Posted by Dadhawk

Assuming you filled the tank to exact capacity (13 GAL), then drive exactly one mile, it would be 0.076923...MPG

Practically though, you would most likely be marginally worse than that because fuel capacity does not normally take into account the fuel filler so you would burn slightly more that 13GAL. Also, I'm not sure if capacity is listed in USABLE fuel or overall capacity when talking cars.

The tank is 13 gallons. Only 12.5 is usable fuel. The tank has a 1/2 gallon area that is not accessible so that sediment and water will not be taken up into the fuel line.

Just FYI.

[Stang70Fastback]

I've filled up with 12.3 gallons on a road trip. That was without forcing any fuel in after it clicked, lol. If what you say is true, then that was a close call, lol (I was looking for NOT Sunoco and that was all they had along the highway, lol.)