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Old 04-20-2012, 04:23 PM   #11
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Quote:
Originally Posted by kam327 View Post
It doesn't matter what their driving habits are, as long as each stays relatively consistent.
Yes, that is the problem. It is assuming too much to come to any general conclusions, IMO.
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Old 04-20-2012, 04:23 PM   #12
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Originally Posted by PratoN View Post
Great idea! Also, I'm sorry my winter tires are messing up your statistics! haha



Jesus... there seems to be no rhyme or reason to my gas mileage trends... it'd be a fun roller coaster, though. My worst mileage was 28.11mpg - and that's because my mom left my car running for an hour one morning so that it could "warm up" >_>

EDIT: I also didn't track my mileage when I first got my car... first time I tracked it on fuelly it was already at 2,912 miles...
Hey, so you're Zoey Kona. Funny I happened to include ya!
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Old 04-20-2012, 04:26 PM   #13
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Originally Posted by TboneZX3 View Post
Yes, that is the problem. It is assuming too much to come to any general conclusions, IMO.
Understood. My opinion is that if 15 out of 20 drivers are showing pretty much the same thing, which is a change of plus or minus 2 mpg over 30 to 50 tanks each, a fairly reliable conclusion can be drawn from that. Which is, you're not going to see a 5 to 10 mpg improvement after the break in period unless you drastically change your driving habits or your car.
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Old 04-20-2012, 04:29 PM   #14
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I see where you're going, and it's neat data to look at.

I would also want to know at what mileage each of their trends started so I knew with certainty that they were in the break-in period. In the first graph, I see more downward trends than I do upwards, as you stated.
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Old 04-20-2012, 04:43 PM   #15
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Hey, I just wanna say that I'm not trying to poop all over your work here. Like I said, it's very interesting and appreciate you putting it together.

I'm a natural cynic.
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Old 04-20-2012, 04:51 PM   #16
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I'm thinking another variable could be climate. Cold vs warm etc. 10000 miles would be likely to start in one and end in the other. I noticed a few MPH as it warmed up. Just sayin'.
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Old 04-20-2012, 04:55 PM   #17
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Originally Posted by TitaniumGero View Post
I'm guessing these are a mix of highway and city drivers? It would probably be more accurate if their driving styles/conditions were the same. The MPG for city drivers would probably vary from traffic conditions.
Actually, that would be almost completely irrelevant. The "trend" is what we're looking for here, not the actual MPG. Percentage increase or decrease over time is the only important thing.
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Old 04-20-2012, 04:58 PM   #18
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I'm thinking another variable could be climate. Cold vs warm etc. 10000 miles would be likely to start in one and end in the other. I noticed a few MPH as it warmed up. Just sayin'.
True. Climate would probably be the biggest factor. My MPG dropped about 3-4MPG during the winter. Now that it's getting warmer. Those numbers should start going up again.

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Originally Posted by hotleadsingerguy View Post
Actually, that would be almost completely irrelevant. The "trend" is what we're looking for here, not the actual MPG. Percentage increase or decrease over time is the only important thing.
Yeah, im getting what kam327 is saying now, but I still think that more factors affect how each persons trend changes.
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Old 04-20-2012, 05:05 PM   #19
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Sample size is far, far to small to get a statistically significant trend from the data
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Old 04-20-2012, 05:12 PM   #20
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Kam ... this analysis is probably just what any high powered research firm would come up with. I did a lot of surveys when I was working at a newspaper and most of the time came up very close results using random selections from a monster data base. Myth busters is right on.

I never got a bit of a kick out of my milage over the 6000 miles we had the car ...
there were months when the around town milage just hung in same, same week after week. now is a touch better with the new clutch ... dct ... duh ... but starting to creap back to the average before the new clutch ... possibly because whatever the new clutch did is wearing off ...
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