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Discussion Starter #1
I purchased my truck as a demonstrator so it already had 5300 miles on her. After driving 700 miles mixed with about 60% city and 40% highway, I'm averaging right at 26.5 mpg. The EVIC was very accurate on the first tank of fuel showing 26.5mpg compared with 26.4mpg calculated. I'm averaging close to 27 on the EVIC now with the second tank of fuel. I would say I've taken it fairly easy over the 700 miles with driving aggressively only a few times. It definitely sucks down some fuel if you get on it regularly and I could see dropping below 20mpg in the city if I drove it hard.

I have a 2wd Laramie Longhorn with 3.55 gears.
 

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No such thing as driving hard IN the city. People do drive hard to get OUT of the city.

Your pickup is doing what it is supposed to do. Enjoy.
 

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That's great, i'd be too tempted to let loose with it every so often.
The screen in the middle showing how you're doing can be very rewarding when it shows you're doing well... like playing a game!
 

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That's great, i'd be too tempted to let loose with it every so often.
The screen in the middle showing how you're doing can be very rewarding when it shows you're doing well... like playing a game!
Yea, that EVIC can drive you mad with the real time fuel consumption lol. I find myself trying to get the best milage I can. Tried to hypermil with the last tank of fuel and it showed 8.6L/km on all highway driving. That changed quickly once I hit the town limits however.
 

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I'm brand new here & I just purchased a Laramie Long Horn Ecodiesel last weekend and I have roughly 350 miles on it so far in a mix of 50-50% city/highway driving. I'm a little disappointed as I'm averaging 20 MPG. I had hoped the highway would be better, but I realize it had less than 5 miles on it when I bought it. When will the mileage begin to climb for the highway?
 

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Should have been in the mid to higher 20's immediately on the highway. Lots of factors unknown but most of us do way better.
 

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Discussion Starter #10
One thing I noticed is you can burn a lot more fuel if you drive it aggressively. I wouldn't have to try to hard at all to get 20mpg. The other thing is I use my cruise control every chance I get. Regardless of how well I try to regulate the accelerator pedal (I originally typed gas pedal...but that wouldn't be correct now would it?), putting the cruise control on seems to net 2-5mpg better. Even in town, I find myself engaging the cruise whenever I can.
 

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I bought it Saturday, drove it around in the city & Monday drove it home (straight 210 miles) at the posted speed limits of 75 & 80 WITH the cruise on.

I called the dealer today & they said it still needs to "learn my driving habits for about 500-1000 miles. I'm heading out to do this round trip again. & see what I get. The dealer did not give me a warm fuzzy when they said "most ecodiesel customers are getting 23 highway with their 2WD 1500s...". That figure is a lot lower than what I've seen posted on these forums!
 

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Rarely use my cruise because it INCREASES fuel consumption for me.

Darn thing wants to keep the same speed UP hills and slows the truck down, down hill. That increases fuel mileage. That's especially true while towing.

I use an "educated foot" to slow on hills and speed up going down. Fuel mileage is improved if you do that.

As for a truck "learning" your habits, there is something like that with the transmission. I think it's bull#*!. Also think the dealer is giving you a version of the same. My take on your relatively poor fuel mileage has multiple issues.

I think there might be something wrong with your particular truck. I also think there might be something wrong with your driving habits. That could be hard acceleration, hard stops, lack of coasting, abrupt throttle pressure, pushing the rpm's up when cold, more city driving that you say, hard cornering, and/or a variation of all those things based on your past driving experiences.

Watch that silly fuel consumption bar for a while and play with your throttle foot to find how you can get it to show up to or over 30mpg as much as possible.

Don't wreck doing it either. Sure it will be a PIA looking down at that thing after a while. It will be less of a pain in the wallet if you find something about your driving habits that can help you improve the fuel mileage.
 

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Well, I did the 210 mile trek again yesterday, & my average is up to 25mpg now. I'm not doing any stop & go until the very last 2 miles off the interstate. I used the cruise as much as possible, but I didn't notice the weirdness of speeding up. It was very smooth.
One thing I did notice that I thought was weird on the mpg EVIC is that the display is not proportional; i.e. going uphill displays 10mpg, but going downhill displays 80mpg! That was just weird.
 

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I wish I was getting that kind of mileage. I have 5000 miles on my truck mostly City driving and I am getting an average of 16 City and 20 highway. Any suggestions? Been having issues with mt check engine light also.
 

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I wish I was getting that kind of mileage. I have 5000 miles on my truck mostly City driving and I am getting an average of 16 City and 20 highway. Any suggestions? Been having issues with mt check engine light also.

Were you loaded down with anything? Elevation? hills? There is alot of factors. I think you should start with getting that chk engine light fixed.. Also i found that not punching it everywhere you go helps out.. Its the driver mod.
 

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Well, I did the 210 mile trek again yesterday, & my average is up to 25mpg now. I'm not doing any stop & go until the very last 2 miles off the interstate. I used the cruise as much as possible, but I didn't notice the weirdness of speeding up. It was very smooth.
One thing I did notice that I thought was weird on the mpg EVIC is that the display is not proportional; i.e. going uphill displays 10mpg, but going downhill displays 80mpg! That was just weird.

If I am understanding your statement correctly, the EVIC should show lower mpg going uphill than when going downhill. If fact with most fuel injected engines, the fuel is cut off when coasting downhill.
 
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