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Old 07-25-2013, 12:02 AM   #1
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Is it possible to get a larger gas tank on a jeep tj

Just wondering because I've been complaining about the gas milege of my jeep lately when I really wouldn't care if I could drive longer without filling up. I would rather bigger payments and less fuel ups if you know what I mean. Also the idea of all day trailing comes to mind. I imagine like an extra 10 -15-20 gallons making 30-35-40 gallons total. I would love to be able to go further on a tank of gas even if it costs more.

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Old 07-25-2013, 12:11 AM   #2
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Jerry can

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Old 07-25-2013, 12:20 AM   #3
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If you don't mind cutting?
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Old 07-25-2013, 12:36 AM   #4
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Genright makes a larger tank.
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Old 07-25-2013, 12:44 AM   #5
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No expert on this, but seems to me you'll definitely be doing some serious tub modifications to fit an extra 10-20 gallons. As it is the stock tank is only 1" from the tub with the stock skid. Are you thinking of doing like a comp fuel style cell in the trunk area?
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Old 07-25-2013, 12:46 AM   #6
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GenRight's Jeep TJ/LJ Extended Range Gas Tank and some Jerry cans? Otherwise you're in custom fuel cell territory.
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Old 07-25-2013, 01:02 AM   #7
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Having an extra 5 gallon capacity, would that effect any fuel consumption? MPG?? I realize any extra weight usually does it but just curious on anyone who has used this GenRight extended gas tank as the link stated above my post. Thanks in advance!
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Old 07-25-2013, 05:50 AM   #8
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Is your tank the "15gal" or "19gal" capacity? Technically they are the same tank. The "15gal" tanks air vent extends further into the tank creating a 4gal air gap at the top. The float for the fuel gauge is also calibrated differently. It is an easy modification to drop the tank full the fuel pump and reach in and cut the vent tube back about 5". If you already have a "19gal" tank ignore this rant.
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Old 07-25-2013, 09:20 AM   #9
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You could get a big fuel cell. An extra 20 mite squat the ass end a little though

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Old 07-25-2013, 09:42 AM   #10
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As mentioned, Gen-Right makes higher capacity tanks.

There's also The Long Ranger from Aussie land.
:: The Long Ranger :: Chrysler Jeep Wrangler
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Old 07-25-2013, 09:44 AM   #11
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Having an extra 5 gallon capacity, would that effect any fuel consumption? MPG?? I realize any extra weight usually does it but just curious on anyone who has used this GenRight extended gas tank as the link stated above my post. Thanks in advance!
Of course extra weight hits mpg. You figure it out. I'll help a little. A gallon of gas weighs a little over 8 lbs so you are carrying 50-55 lbs extra in weight plus that tank is aluminum as opposed to plastic. That's probably another 30 lbs or so. Total, I'd guess adding 80 lbs when full of gas
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Old 07-25-2013, 03:15 PM   #12
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Of course extra weight hits mpg. You figure it out. I'll help a little. A gallon of gas weighs a little over 8 lbs so you are carrying 50-55 lbs extra in weight plus that tank is aluminum as opposed to plastic. That's probably another 30 lbs or so. Total, I'd guess adding 80 lbs when full of gas
Not that it matters but water weighs just over 8lbs a gallon. Gas weighs just over 6lbs a gallon
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Old 07-25-2013, 03:52 PM   #13
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wow that Genright tank is $1000 bucks lol
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Old 07-25-2013, 04:09 PM   #14
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Not that it matters but water weighs just over 8lbs a gallon. Gas weighs just over 6lbs a gallon
Yep you are right. I knew how much a gallon of water was. I did not look up gasoiline. Ok adding approximaetly 40 lbs of fluid
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Old 07-25-2013, 09:46 PM   #15
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You could always remove the back seat an put a 50 gallon res in its place and run a line from it to the existing fuel tank.
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Old 07-26-2013, 05:35 PM   #16
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Anyone know how much the long range aux tank costs? Shipping to the states is most likely high.

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Old 07-26-2013, 11:26 PM   #17
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Best MPG thread yet
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Old 07-28-2013, 01:47 AM   #18
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Thanks for all the opinions, I have a 19 gallon tank. The extra 40-50 pounds of gasoline is menial to me because I am not as annoyed by the price of gas but of the frequency that I have to fill up. Don't quote me but I believe taking out the rear seat alone should compensate 40-50 pounds. I looked at the genright but I have a 04 and no lift so they said it might have some difficulty to install. Instead I am looking into getting a metal gas tank that I could install in the back seat(remove back seats) and Drill/tube to the main gas tank, I understand that this would void the fuel gauge until 18ish gallons but it seems simple enough...thoughts? oh and my jeep is getting a solid 17 mpg atm
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Old 07-28-2013, 10:58 AM   #19
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You could put a solenoid valve in the line between the tanks. That way you know how much of your primary tank you have used then push a button to dump the secondary to the primary.
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Old 07-28-2013, 03:19 PM   #20
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thoughts?

I wouldn't even consider carrying fuel in the passenger compartment.

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