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Old 08-05-2010, 01:35 AM   #1 (permalink)
My Goal: 35 MPG All Day
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Location: South Carolina
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1NZ-FE (Year 1) - '05 Scion xA RS 2.0
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Last 3: 34.02 mpg (US)

1NZ-FE (Year 2) - '05 Scion xA RS 2.0
90 day: 33.32 mpg (US)

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90 day: 35.32 mpg (US)

1NZ-FE (Year 4) - '05 Scion xA RS 2.0
90 day: 34 mpg (US)

1NZ-FE (Year 5) - '05 Scion xA RS 2.0
90 day: 26.87 mpg (US)

1NZ-FE (Years 6&7) - '05 Scion xA RS 2.0
90 day: 26.49 mpg (US)
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Need your opinion on calculation error

Ok so I got my very first fuel log for my 97' accord and it was 15 mpg, and I was like WTF? and figured it was because I had been blaring the A/C all week...

Hoping that the trip was off I looked at the first record I did of the car, it said I did the "maintenance" at 153,274 miles... I subtracted this from the miles of my fill and it said MORE than the trip said the whole tank was...

So the trip must be off and I need to start reading off the odo.. What is the best way you guys think I can calculate the miles that were on my first fill up, I was thinking at my next fill I take the miles down (say its 200m) and take the trip (say its 150m) and calculate the difference (which is 25%) and so id just add 25% of the trip number to itself (hoping it stays consistently wrong) haha

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Old 08-05-2010, 04:31 AM   #2 (permalink)
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escort - '99 ford escort sport
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fill the car and record the odo.

during your tank drive a known distance and compare to the distance your odo says. do math magic to get a % of how much your odo is off

Next fill record gallons and odo subtract old odo from new odo to get miles. multiply miles times % then devide by gallons


Learn from the mistakes of others, that way when you mess up you can do so in new and interesting ways.

One mile of road will take you one mile, one mile of runway can take you around the world.
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