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Old 10-18-2006, 03:35 PM   #1
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Default How accurate is your mileage reading?

When I got my car, the readout for mileage was like right on for a tank or two. Now I've checked the last three tanks, and it'* been way off. The last one said 25.0 with 14.6 gallons used. But when I checked the actual, I put in 15.25 gallons for an average of like 23.7. Does anyone else have a large discrepancy like this? I just think it'* odd that the first couple tanks were right, but now it'* not. I'm thinking my computer is off, or my gas station is starting some shady stuff.
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Old 10-18-2006, 03:36 PM   #2
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it depends on your driving....just cause you have the same miles on a tank dosent mean that you used the same amt of gas you did the time before

also weather also has a large factor in this....come winter time (colder months) there is a differnt blend of gas that is used
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Old 10-18-2006, 03:44 PM   #3
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I think you misunderstood. What I'm saying is my actual calculation of mileage differs greatly from what the car'* computer is showing. On my last tank fillup, the computer said I used 14.6 gallons, but according to the pump it was 15.25. I've seen the same thiing the last three tanks. But the first couple of tanks when I got the car, the computer calculation was almost exactly the same as what I put in.
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Old 10-18-2006, 03:51 PM   #4
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Is that calculation something only available on 00+?
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Old 10-18-2006, 03:55 PM   #5
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Quote:
Originally Posted by vital49
Is that calculation something only available on 00+?
yes there is a fuel used setting on the DIC
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Old 10-18-2006, 04:04 PM   #6
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That'* bascially an average right? So it may be off due to big swings...

00 folks are a funny bunch (You wacko'* know I'm j/k right?)
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Old 10-18-2006, 04:50 PM   #7
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[quote="BillBoost37"]That'* bascially an average right? So it may be off due to big swings...
quote]

No, it'* not an average. When I refill, I reset it to zero, so it should be accurate. I had a Cougar several years ago that had the same readout, and it was always quite accurate. I can even understand if it'* not accurate, I just was curious why it was accurate for two tanks, but now it'* not.

But maybe the comment on gas blend has something to do with it. Maybe the change in gas messes up the computer? Who knows.
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Old 10-18-2006, 04:57 PM   #8
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Or it'* merely starting to have issues like the rest of us older models...

(Gosh..it'* fun to mess with my 00 friends...I sure hope you realize I'm joking around a bit)
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Old 10-18-2006, 05:48 PM   #9
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You know what? Mine does the same thing. Sometimes it'* right on, and others its not. Then when I look to see what my estimated miles per gallon is while I'm driving it'll say 75 miles to a gallon...now that'* so not right. I wonder if there is a way to correct it...
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Old 10-18-2006, 09:51 PM   #10
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Quote:
Originally Posted by BillBoost37
00 folks are a funny bunch (You wacko'* know I'm j/k right?)
I know you aint kidding, Bill! We're wacked out & proud of it. It seems that I usually fill approximately one gallon more fuel in the tank than whats reported on the DIC for fuel usage. And this is consistent tank to tank.
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