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Unread 07-06-2010, 03:56 PM   #31
daggo66
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Quote:
Originally Posted by ncb View Post
Unless you know exactly how many gallons it took to top off the tank after the trip your math is inaccurate.
Fill your tank before the trip and then fill it again after. Note the number of gallons it took to fill and divide by the number of miles driven.

Many factors could account for the difference. What style and size of tires are you running? What was the psi in your tires?

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Unread 07-06-2010, 04:20 PM   #32
quag1509
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Im running the stock tires at 32 psi. I bought it brand new and only have 1400 miles on it now.
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Unread 07-06-2010, 11:00 PM   #33
jezwald101
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fuel mileage

is it a 2 door or a 4 door,,,auto or manual..allot of uphill and downhill?? i have a 2 door 3.21 gears...set in 2 wheel drive...manual trans with 32" mud terrains and it gets 19-20 miles to gallon with top off....you need to fill tank before starting trip,,write down mileage or reset trip ometer and run till empty(or you feel safe running on the fuel light or guage)and fuel up,noting the gallons added back to full and divide the miles from gallons used..so say you went 340 miles on 16.5 gallons of fuel would be.. 340 divided by 16.5= 20.60 miles to gallon....
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Unread 07-07-2010, 12:42 AM   #34
waterboarder
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Originally Posted by daggo66 View Post
You don't drive very fast do you?
I drive a Jeep. It doesn't go very fast. So, no.
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Unread 07-07-2010, 01:52 AM   #35
JLC08JK
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Mine gets 1 tank a week around town, 1 tank a day on a road trip, and 2 tanks a day on a long road trip!
I'd say thats pretty good mileage
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Unread 07-07-2010, 07:30 AM   #36
Vin
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The problem is that you are going 75 mph. My rubi 2 door get's 19-20 mpg as long as I stay below 70. at 75 my Rubi is reving at 2800 rpm and the estimated mpg indicator in my dash actually starts going down. At 65-70 is stays put and 55-60 starts going up. At 75 mph you'll get about 15 mpg.
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Unread 07-07-2010, 10:06 AM   #37
OregonVette
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Ftw!!!!!!! ^^^

The instant you drive over 65-68mph (depending on gear & model)
You will see a huge loss in mpg.

If you wanna Keep it safe in Jimmy Carter-ville, around 55-58 you will get decent mpgs.


There's no way in he77 that a jk can get 12 mpg while another gets 22.5 on the same roads/ condition / build etc.


Unless you have 13psi in your tires, towing a boulder, a rat in your air cleaner assy., your math is probably suspect.


Just take it easy, take the top off & enjoy the f'en view, relax and remember: it's a jeep ~ "it's not that you will, it's that you can!"
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It's hard to give you good advice at this point. It's almost like you're saying, "I want to have sex, but don't want to get her pregnant. I can't afford condoms, so for now I just want to use Saran Wrap. What brand would you recommend?"
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Unread 07-07-2010, 10:57 AM   #38
YellowDuck
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Quote:
Originally Posted by Vin View Post
The problem is that you are going 75 mph. My rubi 2 door get's 19-20 mpg as long as I stay below 70. at 75 my Rubi is reving at 2800 rpm and the estimated mpg indicator in my dash actually starts going down. At 65-70 is stays put and 55-60 starts going up. At 75 mph you'll get about 15 mpg.
Yep, exactly the same experience. Best mileage is on the rural roads, going 50 to 60 mph. Get on the highway going 75 and it burns noticeably more fuel per mile.
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Unread 07-07-2010, 11:02 AM   #39
plac
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The average highway speed across the US is 75mph, (myself included), so that just means dont worry about mileage, just enjoy the drive. going 55mph would probably get me a ticket for under speed limit and impeding traffic.
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Unread 07-09-2010, 03:38 PM   #40
quag1509
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Im not going to drive below the speed limit on the highway.I should be able to do 70 all day and get better than 14mpg. In my other Jeep I was getting 21mpg on the highway and in my new Rubi I was able to get 14 according to my in dash reading. The best that I have seen so far is 15.8mpg and that is city driving. I drive the thing like an old lady and still cant get any better than 15.8. I know its a Jeep and I didnt buy it for fuel economy but a 2010 with less than 2k miles not able to get over 16 when my 08 unlimited was never lower than 19!
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Unread 07-09-2010, 04:04 PM   #41
plac
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Originally Posted by quag1509 View Post
I know its a Jeep and I didnt buy it for fuel economy but a 2010 with less than 2k miles not able to get over 16 when my 08 unlimited was never lower than 19!
Not true... the mileage will get better as you get up to 10,000 miles on the engine.
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Unread 07-09-2010, 04:16 PM   #42
Vin
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sorry, but your Rubicon is not going to get the same milage as yo9ur Sahara. You have different gears and different tires. = agree you should be able to get more than 14 mpg, so either your math is wrong or you have something mechanically wrong.
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Unread 07-09-2010, 04:24 PM   #43
quag1509
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I understand its not going to get what my Sahara did but 14? That is what I read from my in dash read out. Spoke to the dealer and they said the motor has to break in..... I hope it gets better!
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Unread 07-09-2010, 08:30 PM   #44
Vin
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Originally Posted by quag1509 View Post
I understand its not going to get what my Sahara did but 14? That is what I read from my in dash read out. Spoke to the dealer and they said the motor has to break in..... I hope it gets better!
You are going by the dasboard read out? Did you try and divide the miles you drove by the amount of gas you out in?
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Unread 07-09-2010, 08:57 PM   #45
Prot
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I can make my dashboard readout read 38 mpg. I can also make it read 9 mpg. Math is the only accurate method. You also need to use the correct numbers to do the math. Tank capacity is a sure fire way to throw your math off. You also need to verify that your speedometer is accurate. If there is an error is in your speedometer, all bets are off.
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