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Isuzu Axiom Real World MPG Numbers

15 messages,  Last post on Apr 19, 2007 at 2:56 PM

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#12 of 15 my mpg by bren Apr 16, 2007 (2:17 pm)
I just bought a 2004 Axiom S 4WD with only 6,000 miles. (Yes, that's right.) So perhaps it's not yet 'broken in' and mpg may improve a bit.   On my 2nd fill-up, the average mpg reading provided by the vehicle's display claimed 17.9 mpg, but when I calculated the miles I drove divided by the gallons used, my personal calculation was 16.1 mpg. That's a pretty significant discrepancy -- basically 10%!   By the way, I am a delivery driver. The 17.9 mpg figure would be rather good if it were true. 16.1 mpg is certainly what I expected when I bought this vehicle. Replies to this message: jamrock02 (Apr 16, 2007 3:16 pm) cptsesso (Apr 19, 2007 8:51 am) bren (Apr 19, 2007 2:56 pm)
#13 of 15 Re: my mpg [bren] by jamrock02 Apr 16, 2007 (3:16 pm)
Replying to: bren (Apr 16, 2007 2:17 pm) I asked my dealer about this same thing and was told the on-board system only gives an estimate of MPG and miles to empty.
#14 of 15 Re: my mpg [bren] by cptsesso Apr 19, 2007 (8:51 am)
Replying to: bren (Apr 16, 2007 2:17 pm) Did you reset the average mpg after you filled it up? If not, reset it after the next fill up and check it again. You will find it is much more accurate this way. Replies to this message: bren (Apr 19, 2007 2:56 pm)
#15 of 15 Re: my mpg [cptsesso] by bren Apr 19, 2007 (2:56 pm)
Replying to: cptsesso (Apr 19, 2007 8:51 am) Yes, I have reset it each time. Today I filled up and calculated 17 mpg while the display claimed 18.7 mpg. So the display was 10% off again.   Oh well.   I'm curious if using synthetic oil and a K&N air filter would improve mpg a bit. I often read people claiming that doing this can add 1 or 2 mpg, but I did both things for my previous car just a month before selling it, and they basically had no impact.

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