Great MPG - Page 2 - Ram 1500 Diesel Forum
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post #11 of 15 Old 11-22-2014, 08:55 AM
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Can't get true mpg figures with 200 miles trips or just one tank...really need about 8-10 fillups to account for the top off variance ... so easy to pump two more or two less gallons at each fillup. After 8-10 that variance is minimal.
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post #12 of 15 Old 11-22-2014, 10:32 AM
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I'm not in the automotive industry but do have many years doing the shade tree mechanic thing....i find it extremely hard to believe that there can be a 2 gallon variance on fill ups. With my new truck i never top off.....simply let it click off when it needs to. Not taking sides here and I do agree the 200 mile trip is not necessary accurate if you are just taking evic for what it says. I can tell you in over 4400 miles I'm averaging 23.2 mpg hand calculated.

Just My .02
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post #13 of 15 Old 11-22-2014, 12:41 PM
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the 2 gallon number +/- is a range...not an absolute...could be .5 gallons. The point is that different pumps, human tendencies, temperatures and so on do factor in...if you fill up 8-10 times you minimize those variances.


Let's see...200 miles with one 10 gallon fill up...20 mpg


Or trust...2096 miles with 8 fill ups with a 114.7 gallon total...18.28mpg


Kind of the reason that overhead displays of instant mpg differ from hand calculations.
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post #14 of 15 Old 11-22-2014, 01:27 PM
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Totally agree with you. Your first post just reads as if one time you fill up and it's two gallons more and the next time you fill up its two gallons less which is a 4 gallon swing and 4 gallons is a huge difference when doing the hand calculations.
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post #15 of 15 Old 11-24-2014, 10:50 AM Thread Starter
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OK DieselDawg is 100% correct. This is my first Diesel and my enthusiasm got the best of me. I now have 2500 mi on my Eco and via hand calc I ave 23MPG. The EVIC trip since I've owned it says 21MPG and when I use the other trip calc it's a bit off also.
Even with the exhaust issue which hopefully will be resolved soon I love the Diesel.
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