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  #1  
Old 11-19-2013, 10:28 AM
dlr dlr is offline
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Default MPG Dropping off Suddenly

I have a 2012 Express Hemi that up until recently have been averaging around 15 to 16 mpg with a mixture of highway and city driving. About two weeks ago my mpg started dropping all of a sudden and over the next couple of days got down to about 13.2. I have been using the same gas station and the same route to work since purchasing the truck and I don't understand the sudden dropoff. Is it the winter fuel or do you think I have an issue with the truck? I am going to hand calculate the mileage when I fill up next to confirm the mileage. My commute to work is more on the highway side so that's why I am concerned. If my commute was mostly city I would not be all that concerned about it. Anyone have any insight other than to go buy a dart if I am concerned with mileage? I understand it is a truck but 13 mpg sucks no matter what you're driving.
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Old 11-19-2013, 10:34 AM
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could definitely be the winter fuel.

also maybe a tune up is in order. spark plugs/air filter/etc.
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Old 11-19-2013, 10:40 AM
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winter fuel time. happens every year.
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Old 11-19-2013, 11:03 AM
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That's kind of what I thought but I don't remember it dropping this much last year. I will have to check my air filter but I would'nt think I would need plugs yet. I just turned 14,000 miles. I forgot to mention that in the original post.
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Old 11-19-2013, 11:21 AM
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Quote:
Originally Posted by dlr View Post
That's kind of what I thought but I don't remember it dropping this much last year. I will have to check my air filter but I would'nt think I would need plugs yet. I just turned 14,000 miles. I forgot to mention that in the original post.
gotcha. check ur tire pressure, make sure it's where it should be. low temps could be causing them to run a little low on pressure which doesn't help MPG
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Old 11-19-2013, 11:52 AM
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Ok Thanks. Never thought of Tire pressure but I will check it also. Thanks for the help.
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Old 11-19-2013, 12:49 PM
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Yup, good info from gonefishin ^^

This time of year I would definitely expect the winter fuel to be a huge factor in it. Unfortunately that's just how it is. But with it getting colder now checking your tire pressure is a great idea as well. I doubt they would drop too much but everything makes a difference.
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