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Discussion Starter · #1 ·
can someone explain to me why on some days my ram will get 20-24 mpg on the hwy then some others it will only get 14-16 mpg?? Does anyone else have this issue or am I not seeing something?
 

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Mine does the same. I think it has a lot to do with the weather and if its very windy out. That and sometimes even the best gas stations will have crap gas especially this time of the year when they add more ethynol..
 

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Does the difference perhaps have something to do with the amount of pressure exerted by your right foot?

I know when I run 80+ my mileage suffers, but I usually do it anyway LOL

Exco
 

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can someone explain to me why on some days my ram will get 20-24 mpg on the hwy then some others it will only get 14-16 mpg?? Does anyone else have this issue or am I not seeing something?
If you are using the EVIC as your reference......there is the problem. The best method is to calculate it yourself. The EVIC is simply a guide and not all that accurate. erratic driving habits seems to impact it more than anything. Just like going from a lot of stop and go traffic then highway driving.
 

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Discussion Starter · #7 ·
If you are using the EVIC as your reference......there is the problem. The best method is to calculate it yourself. The EVIC is simply a guide and not all that accurate. erratic driving habits seems to impact it more than anything. Just like going from a lot of stop and go traffic then highway driving.
Ill try not using EVIC.
 

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I had a 2004 4.7 quad cab and now have a 5.7 Hemi quad cab. Both are get about the same mileage 11.5ish. I have a fuel log app on my driod. It's a free app and I log everytime I fill up. Oh yeah and both have/had about 88k
 

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The fuel app is great. I use https://www.fuelly.com/ . Smartphone, iPad or computer is easy.

As for the question of fuel. If your within generally 400 miles of a refinery, they usually deliver from the source. But generally further, when and order is placed, it goes to the local spot market station and they blend and ship to the specs needed. This includes seasonal additives as needed. You have no control over this. (summer blends and winter blends are different and does effect mpg's.) Also, if the blend is off, your stuck with this.

As to weather and road conditions, you basically have no control over. You play the hand you are dealt, and adjust as needed.

The overhead lie-o-meter is usually off or it wouldn't have achieved this nick name. But if yours is like mine, it's a constant amount off and I only use it as a guide to the increase or decrease in tenths. If dropping and not going up a grade, I need to adjust. If dropping slightly it can also inform me that there is a slight grade and adjust as needed. Means a lot on a vacation 5k round trip in gallons.

There are two areas that you have some control over.
* Maintenance of your vehicle:
If you maintain it properly, you might not like the mpg's, but they will be better than if you neglect it. Minor changes mean a lot.
* Foot to the pedal;
It was mentioned above and this is usually the main demon. Most never think of this, but your emotions at the time your foot hits the pedal determines what mpg you will get. If you pi**ed, happy or such, the pressure is different than if you want great mpg's.
 

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Discussion Starter · #11 ·
I heard about winter blend and summer blend gas. Winter blend has more stuff in it to make sure water dont get into your gas. Therefore less MPG's in the winter. I understand the foot pedal thing. I have found a "sweet" spot on my truck to where I can put the pedal in that area and get the best MPG's. The weather has been warmer here all week and I am getting better MPG's. I am starting to think how cold it is is huge on depending what the MPG's of my truck gets. I hardly drive agressively on the Highway (which is 90% of my driving) So I can say it is not me changing how much my truck uses gas.
 

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Summer blends verses winter blends are quiet different. But fuel vapor pressure is important. During the summer the refineries have a large stock of Ic4's because they cannot use as much as they would like in gasoline blends, raising this pressure to much. During the winter they can increase the amount to increase the vapor pressure and still be in specs. This causes the blend to be lighter. They expend the excess products they fight to store or use for other products and we pay for it. This can also change the burn energy of the fuel and can change mpg's. There is a lot more difference in them, but this is only one reason your mpg's can be different during different times of the year and in different parts of the country.
 
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