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Old 04-20-2019, 01:53 PM   #1
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9.7 MPG

Just made the trip from Navarre Fl to Ocala and managed 9.7mpg. Not too shabby. The second leg to Ft Lauderdale was not so good. Stop and go on Rt 27 milage dropped to 8.4. Still not terrible. Kept it under 60 the entire trip
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Old 04-20-2019, 03:00 PM   #2
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You really won't know your real mileage until you get multiple legs under your belt. It very well may be that at your fill-up following the 1st that you didn't actually shut off at the full mark, and made up the difference at the 2nd fill-up. So your mpg calc would have had a smaller denominator the 1st (and higher mpg) and a higher one for the 2nd (lower mpg). But I'd love to get anywhere near 9 mpg. Will be interesting to see where you settle out.
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Old 04-20-2019, 03:14 PM   #3
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I must be the only one that cannot break 7.3 MPG on 3 different Cummins powered MH's Even with a 35 MPH tailwind in Nebraska on I-80 I got 8.1..best ever. We drive a lot of 2 and 4 lanes with 55 speed limit, still get 7.3.
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Old 04-20-2019, 03:20 PM   #4
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Come on out west. The Rockies and Cascades await you.
On flat ground I can see 9+ with my ISX too. My overall average for 51,000 miles and towing a CR-V is 7.7 mpg.
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Old 04-20-2019, 03:36 PM   #5
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Quote:
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I must be the only one that cannot break 7.3 MPG on 3 different Cummins powered MH's Even with a 35 MPH tailwind in Nebraska on I-80 I got 8.1..best ever. We drive a lot of 2 and 4 lanes with 55 speed limit, still get 7.3.


I donít think I could break 7.0 behind a tow truck!!
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Old 04-20-2019, 04:00 PM   #6
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You really won't know your real mileage until you get multiple legs under your belt. It very well may be that at your fill-up following the 1st that you didn't actually shut off at the full mark, and made up the difference at the 2nd fill-up. So your mpg calc would have had a smaller denominator the 1st (and higher mpg) and a higher one for the 2nd (lower mpg). But I'd love to get anywhere near 9 mpg. Will be interesting to see where you settle out.
I have 30k miles of travel under my belt, averaging ~8. I just reset for this trip to see how driving under 60 on flat terrain would fair
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Old 04-20-2019, 04:06 PM   #7
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Well then you already know what I was telling you. I'll still be interested in where you settle out when you get enough data.
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Old 04-20-2019, 05:01 PM   #8
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I stopped looking at mine, because it always reads 7.3mpg.
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Old 04-20-2019, 05:06 PM   #9
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We just filled up also and averaged 9.6 as well. Nice surprise. Wonder what it will be when we get the Jeep behind us on a longer trip.
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Old 04-20-2019, 05:14 PM   #10
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I have 30k of data. Towing, car, race trailer, hills, flat , not towing etc, I average 8
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Old 04-20-2019, 05:18 PM   #11
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I don’t think I could break 7.0 behind a tow truck!!
With the new IX I think the days of 7.3 are over as well. Can't wait to get to CO and MT this summer being really pleased to break 6 mpg. I still use a calculator, not the dash computer read out as all of mine have lied by at least 1/2 MPG.
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Old 04-20-2019, 05:32 PM   #12
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Our 2018 Cornerstone gets 9.7 MPG all the time..











In my dreams...
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Old 04-20-2019, 08:30 PM   #13
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Your mileage depends upon how much load you put on the engine. Weight, hill climbing, and wind dictates that. If you are full timing like us all you own is in your coach resulting in more weight, Florida is flat at sea level, all of America is up hill from there, a tail wind helps but we just ran two days into a north wind ( it happens). After almost five years of full timing running coast to coast in wind storms and calm, sea level to 8,000 feet we have averaged 7.1 MPG. Just saying. Also, as I tell most folks that ask, "If you have to worry about the MPG, you can't afford the coach. . Happy trails
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Old 04-20-2019, 09:17 PM   #14
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The MPG thing is very subjective. I have found that fill ups always depend on what side you fill up on. If I fill on one side, it will take 4 or so more gallons after the nozzle cuts off, then the other. Then the trip calculator is dependent on the actual fill up, idle time, generator run time, speed, hills, wind, etc. According to my trip calculator, I average and or instant mileage I average between 7.8-8.4 mpg running 68 mph. 65 mpg really don’t make a difference in my mpg. I have quit focusing on what mpg I get and put fuel in when it needs it.
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