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post #16 of 31 Old 07-30-2012, 09:02 AM
JeepCares
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You can get more information on EPA ratings and fuel economy at http://www.fueleconomy.gov.

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post #17 of 31 Old 07-30-2012, 01:20 PM
FujativeOCR
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So looking at that epa website, I see they test cars with 100% gasoline. No Ethanol. Out here in California, all we get is 10% Ethanol Gas. Can't get 100% real. So perhaps that does explain my 16 mpg. A 10% hit in mpg would be 2 mpg in my case.
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post #18 of 31 Old 07-30-2012, 05:46 PM
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The higher the mileage claims, the greater ethanol's effect appears to be on cars. My 4.7L V8 Dakota is rated at 14 and 19 (2 or a little more MPG difference), and the 5.9L gas guzzler was 12 and 16 (1 or a little more MPG difference). So I can see how a 21 city/26 hwy car would get 3 MPG worse with 10% ethanol.

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post #19 of 31 Old 08-07-2012, 08:14 PM
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We had a fire in an oil refinery here in Cali last night so I went and filled up a little early. Still had a quarter tank left but here are the results from the most recent tank of all city driving, and A/C on 90% of time.



image-743182289.jpg



image-683582807.jpg



14.5 mpg per the car, 14.8 mpg by the calculator. Not good either way.
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post #20 of 31 Old 08-08-2012, 07:58 AM
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I've been hammered before for not recommending the FD II to someone living in the UP of Michigan who said they wanted a DD with GOOD gas mileage. This just proves my point. Of course you having all in city driving with ethanol formulated gas is the WORST possible combination.

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post #21 of 31 Old 08-08-2012, 05:16 PM
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Fujative, whats the check light engine on for (picture 1)?

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post #22 of 31 Old 08-08-2012, 05:35 PM
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The car wasn't running but the key was on. Thus the seat belt sign and no rpm's as well.
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post #23 of 31 Old 08-08-2012, 06:41 PM
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The RPMs... yeah, I uh, thought your tach was broken... yeah, sure...

Sorry for the dumb question, didn't notice that. Does the FDR II make that much of a difference? I suppose if you took ethanol gas out of the equation, you may get a few MPGs back, maybe up to 17 or a bit more. Too bad you live in California where thats all you can get (or so I am told).

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post #24 of 31 Old 08-08-2012, 08:21 PM
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Apparently it does. Like I said A/C was on for most of this, so that's a mile or two. I drove at the speed of traffic for this, which is about 2500-3000 rpm to accelerate with everyone else. I normally accelerate at 2,000 rpm but it pisses everyone else off because it takes so long. But yeah this is what I'm dealing with. With no A/C and hypermiling I get 17-18. Still not the advertised 20.
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post #25 of 31 Old 08-08-2012, 11:46 PM
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20 is the "average" of all "driving styles." If you look below that big number, in fine print, it will say something along the lines of "Expected range for most drivers will be 16 to 24." Add ethanol gas in there, with the California driving style, and that might put you at where you are at.

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post #26 of 31 Old 08-09-2012, 12:16 AM
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Yeah Ive pointed out the fine print many times on here. But to get an average of 20, that would mean it would have to both go below and above 20. Mine never goes above 20 in city driving, and certainly not 24. Not sure what you mean California driving. Traffic seems to move the same pace here as every where else I've lived.

Edit: at least Fresno does. I could see LA and San Fran people having unique driving styles. But I'm nowhere near there.
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post #27 of 31 Old 08-10-2012, 07:16 PM
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Just disconnected the battery for like 2 hours. See if this thing can relearn how to drive.
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post #28 of 31 Old 08-13-2012, 10:15 PM
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I'm getting 26mpg on average in my non FDII Compass, but my commute is rural Iowa so it's out of the driveway and one the two lane for 33 miles one way. I'll reach 39k miles by Friday.

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post #29 of 31 Old 08-16-2012, 10:59 AM
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I get 26-29 MPG highway and 22-24 when most of the driving is in town. I have gotten as high as 32 and as low as 20 (in town, winter).
of course, I have the 5 spd manual and no off road package, but I am getting very close to the mileage listed.
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post #30 of 31 Old 08-16-2012, 02:45 PM
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I grew up in Iowa, live in Nebraska and go back to NW Iowa to see family multiple times a year. I have a 2011 Pat with FDI and when I drive 55-58 on the hwy I get 24-26mpg when the a/c is on and 27-28 mpg without the a/c. On the interstate at 70-75mph it will drop to 22-24 with the a/c on. Normally I get 22 in city driving. We went to Southern MO on vacation a month ago and I drove 75 on the Interstate with a topper and the a/c on the whole way and averaged 23mpg. The worst mpg for the trip was when we did some off roading and I got 16mpg with that fill-up.

I have tracked every mile and fill-up with fuelly and with 9098 tracked miles since late March I have averaged 22.2 mpg.

I have mixed feelings about doing this being that I am from a farming family but I stay away from fuel with ethanol. An experiment I did with my Commanders showed a 12%+ drop in mpg's when using a 10% ethanol fuel. That difference is more than enough to offset the extra $0.05-$0.10/gallon difference in cost.
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