SVOboy -
I can't tell what I am doing wrong. I have these numbers in my fuel log :
Quote:
* Lifetime Fuel Economy: 42.5
* 90-day Fuel Economy: 44.33
* 3-tank Fuel Economy: 45.56
* EPA Rating (% over): 27 (64.1852%)
* Total fills: 153
* Average cost per gallon: $2.95
* Average cost per fill: $15.89
* Average cost per mile: $0.07
* Total gallons used: 827.08
* Total miles traveled: 35153.8
* Total cost: $2439.89
* Total saved: 223.31 gallons
* Total saved: $658.76
* Average tank distance: 229.76
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When I take my total miles divided by my total MPG I get these total gallons :
35153.8 / 42.5 = 827.14
If I divide the miles by EPA MPG I get these gallons :
35153.8 / 27 = 1301.99
When I subtract the two I get
1301.99 - 827.14 =
474.76 Gallons Saved
But according to my fuel log I saved 223.31 gallons.
What is wrong with my computation?
CarloSW2