Only 13mpg? - Ram Rebel Forum
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post #1 of 20 Old 10-11-2017, 11:19 AM Thread Starter
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Only 13mpg?

Hello,

I just bought a brand new 2017 Ram Rebel with 5.7 Hemi last night from a dealership that was two hours away. The drive back was all highway and I was only averaging 13.2 miles per gallon at 65-70MPH.

Window sticker is 21 & 17.

Should I be that far off? Am I missing something? Some sorta fuel efficiency button?
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post #2 of 20 Old 10-11-2017, 02:45 PM
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Seems very low. If brand new it will take a bit to break it in and get more consistent MPG numbers that aren't alarming. I just did 250 miles mostly highway between 75-85 and I averaged 16.4 miles to the gallon
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post #3 of 20 Old 10-11-2017, 04:23 PM
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I've got about 150 miles on mine and my average is about 13.2 I believe. I knew it would be a little worse than my previous truck, which had 3:21 gears. I'm assuming all Rebels (mine, anyway), have the 3:92 running gears. Lower gears = faster pickup, but worse fuel mileage.
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post #4 of 20 Old 10-11-2017, 06:07 PM
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I have 800 miles on my 2017 Rebel with 3.92 gearing, 4x4, Mopar cold air intake and magna flow exhaust

When I picked up from dealer all highway home I averaged 14mpg at 70
After installed the CAI and Muffler I get 16,17 at 70 still sucks really bad.
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post #5 of 20 Old 10-12-2017, 07:50 PM
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My 2017 has 2000 miles on it now. I get around mid to upper 16s on mostly 2-lane country roads and some short interstate runs. I did avg 19 2 weeks ago on a 3-hour drive doing 60-70mph. The only things I've done so far is Carven exhaust and a low profile bed cover. Tires are still at 55psi.
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post #6 of 20 Old 10-13-2017, 12:36 PM
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Break-in takes a bit. I didn't see 16 until 2000 miles, then pushing 18 around 9,000 miles. You aren't going to see 21 unless you put P rated road tires on it and drive 55mph down a flat highway with no wind.
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post #7 of 20 Old 10-16-2017, 06:55 PM
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Garage
I just broke 5k miles and been averaging 15. mpg. When I first got it I was in the 13's.
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post #8 of 20 Old 10-19-2017, 02:18 PM
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Quote:
Originally Posted by RandyBW View Post
I've got about 150 miles on mine and my average is about 13.2 I believe. I knew it would be a little worse than my previous truck, which had 3:21 gears. I'm assuming all Rebels (mine, anyway), have the 3:92 running gears. Lower gears = faster pickup, but worse fuel mileage.

Not all, mine has 3:21. I'm averaging 19. Truck computer consistently higher than hand figured. I've had truck say 21.5 for a tank. Hand calculated best I've ever got was 20.1.
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post #9 of 20 Old 10-20-2017, 12:05 PM
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Originally Posted by crappieduster View Post
Not all, mine has 3:21. I'm averaging 19. Truck computer consistently higher than hand figured. I've had truck say 21.5 for a tank. Hand calculated best I've ever got was 20.1.
Wow! That's crazy, you're lucky!! I've got right at 300 miles on mine and I think I've just managed to move up to 12.9 mpg. I was mistaken earlier when I said I was getting 13.2 (it was actually 12.7).
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post #10 of 20 Old 10-20-2017, 01:59 PM
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Originally Posted by RandyBW View Post
Wow! That's crazy, you're lucky!! I've got right at 300 miles on mine and I think I've just managed to move up to 12.9 mpg. I was mistaken earlier when I said I was getting 13.2 (it was actually 12.7).
What are you going by? Computer? Try resetting. May have had a lot of idling at dealer. Wouldn't get to concerned until you fill up and do the math.
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