Fuel guage/warning light

[Blu bi Kong]

My question becomes, from a completely empty tank, how many gallons did it take to fill completely?

I poured in my 3.5 ( I actually only had 3 gallons in can) then went to gas station and put in 18.4 gallons.

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[Blu bi Kong]

And thanks, was wanting someone to go all Kramer on theirs so I didnt have to!

Oh, and on another test, before the whole range starts getting weird and saying low range, after wheeling in Mammoth and driving to Bishop my range said 166. I poured in the full 3.5 gallon can and when we started it up to go have dinner the range had gone from 166 to 222. My reserve can gave me 56 miles.

 

[Bswen]

I poured in my 3.5 ( I actually only had 3 gallons in can) then went to gas station and put in 18.4 gallons.

Ok thanks for the response. Ive been skeptical that the tank actually holds 21.5 gallons. Not that I really believed FCA would put the wrong tank on (on purpose or accident) but I was entertaining the idea...

Being that I dont carry an extra tank around with me Ive never ran it that low. But Ive got 10 miles past where it just said low range and then filled up 18.0 gallons. Kind of makes you think, "maybe I accidentally got the 18-gallon tank from the 2-door".

 

[shacdaddy]

Reminds me of the Seinfeld episode where Kramer goes on the test drive.

 

[Movingday]

Haha perfect!

 

[NFRs2000NYC]

I've done 45 miles when the low fuel light went on. Was driving up to canada and the gas station I planned on stopping at was closed, and it was the middle of the night. I was sweating bullets, but the Jeep made it to another gas station that was 40 miles away. 15 of those miles were town driving, and the rest were fairly hilly miles. I did however hypermile to make sure I get maximum range. Never travel long distances without my rotopax units anymore lol.

 

[Budagreg]

I ran the "Dealer tank (89 octane) past the range warning down to the ''low warning" light, then filled up with 17.0 gal leaving 1/2 gal reserved.
Nothing but 93 octane now... 22.5 mpg city

Update: indicating 25.2 mpg on my commute! (indicate (dash) was only off by <0.1 mpg on first 2 tanks)

 

[S2k Chris]

I noticed the same thing.

What's especially obnoxious is that it cancels the remote start when the gas light is on. Which, okay, fine, but when the light comes on when you hit about a quarter tank, that's pretty annoying.

 

[crjwingman]

Ran mine down past the low fuel warning to the "low" range indication. Put another 23 miles of hard stop and go Chicago driving. It took 19.1 gallons after that so still another 2.4 left. Even at the measly 15 mpg I get running around Chicago, that's another 37 or so miles to empty, so almost 60 miles from the low range indicator.

 

[AVGeek99]

I have a habit of running mine to just about empty. I've always done this with all my vehicles. Ran out of gas just once, in my old Infiniti. Stopped at the grocery store with plans of filling up right across the street when done getting groceries. Came out and my car wouldn't start. Had to walk across the street to get a couple gallons.

I run my JLUR about empty every tank when I'm around home and I've come to know what to expect. Warning light comes on at 30 miles range left, like clock work. When it get's below 10 miles it switches to "low range", and I know it's time to fill up, or else.

I learned right away that with the gas pump at full speed it will always stop after pumping between 18.5 and 19 gallons, occasionally just a bit more. After it stops I top it off. Some pumps will allow you pump at a very low flow rate, others not so much. With the pumps that allow a very low flow I can put in another 3 gallons on average, sometimes as much as 3.5 gallons. In order to get this much extra, you need to pull the nozzle out an inch or two so the pressure can escape. The most I've pumped at one time in my JLUR was 21.7 gallons. But again that is 18.5 to 19 gallons at full speed and then another 3+ gallons at a little better than a trickle. I regularly put in 20.5+ gallons in at a time.

In my Infiniti and my Nissan Maxima before that I could go another 50 miles plus when the range went to zero. When the Jeep goes from 10 miles to "low range" I don't like going much more than 10 miles. When I go 10 miles with "low range" displayed it will normally take about 21 gallons with the method above.

More and more pumps around where I live won't pump at a slow enough flow rate so on those I can only get about another 1/4 gallon after it initially stops. I know in some places there's really no way to top it off after the pump stops automatically.

ymmv

 

[autotragic]

Just filled up my brand new JL Sahara for the first time and I noticed something really weird. The warning light came on with about 35 mile left in range and what looked like a little under 1/8 of a tank on the needle. I won't go into the details between that and getting to the pump but I will say that at one point I did watch the needle indicate higher (by like a good 1/16th or more) from where it had previously been. I live in Chicago (flat as hell) and was on the highway at a steady clip so there wasn't really any physics reason for the change. The real surprise came when I got to the pump and, after having put maybe 15/20 miles on it after the light came on, the tank still only took 16.5 gallons. That tank is supposed to be 21.5 gallons which means there was really just a little under a quarter tank left! Given that the two door tank is closer to 18 gallons, I'm wondering if Jeep does not bother to calibrate the guage for the different sizes. Has anyone else had experiences similar to this?

I'm not sure about the four-door but the computer in the two door is basically programmed to ignore the last 2.5 gallons in the tank. So even when you run it all the way down to empty on the gauge you still have 2.5 gallons left.

The most gas I've ever put in my Jeep so far has been something like 15.3 gallons and that was after getting it down to empty and driving it for another 10-15 miles.

 

[AVGeek99]

I set a new record last week. I drove 20-25 miles after it went to "low range".

According to my wife, she has seen a turtle appear on her gas gauge when she has gotten really low in her 4xe. It also went into a semi limp mode and wouldn't drive over 40mph. None of that happened to me, so either that is 4xe specific or I had more gas left than I thought.

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