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20 gallon gas tank (oem or aftermarket??)This is a discussion on 20 gallon gas tank (oem or aftermarket??) within the Body, Electrical, Chassis forums, part of the Any and ALL Aftermarket Parts and Additions category; Currently, I have a 20 gallon gas tank on my 1983 CJ5. I always though that ALL CJ5's had factory ...
20 gallon gas tank (oem or aftermarket??) 
05-20-2018, 02:18 PM
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#1
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New Jeeper
Vehicle(s): 1983 CJ5 I6 258 4-spd. manual Dana-30 frt; AMC-20 rr. Stock/orig; Red w/new Bestop soft top.
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Currently, I have a 20 gallon gas tank on my 1983 CJ5. I always though that ALL CJ5's had factory 15-gal. tanks...until I started researching for a replacement. It's my understanding that there are two 20-gal. options: 1) replaces oem 15-gal. 1) replaces oem 20-gal. I just need to know which size my jeep came with out of the factory. I appreciate any help. Thanks to all!
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Re: 20 gallon gas tank (oem or aftermarket??) 
05-20-2018, 02:23 PM
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#2
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Vehicle(s): '86 CJ,258,T-18,4:1,Dana 44s
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I think it was around '81 and on that AMC had an option on the CJ7 for the plastic 20 gal. tank. I have also seen heavy duty aftermarket skid plates just for them.
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Re: 20 gallon gas tank (oem or aftermarket??) 
05-21-2018, 10:16 AM
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#3
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New Jeeper
Vehicle(s): 1983 CJ5 I6 258 4-spd. manual Dana-30 frt; AMC-20 rr. Stock/orig; Red w/new Bestop soft top.
Join Date: Jun 2014
Location: Missouri & Colorado
Age: 57
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It's definitely not the poly. So, do you think it's safe to assume that it's not oem original? If I want to go with a 15 gallon...do you think I'm safe ordering a 15-gal. oem?
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Re: 20 gallon gas tank (oem or aftermarket??) 
05-21-2018, 06:56 PM
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#4
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Sr Respected Jeeper
Vehicle(s): '86 CJ,258,T-18,4:1,Dana 44s
Join Date: Nov 2011
Location: Yorba Linda,Ca.
Age: 69
Posts: 5,120
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Thanked 836 Times in 763 Posts
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To install a 15 gal. oem tank, it will take a fuel pickup for that tank. Along with the 15 gal. skid plate w/padding. The fill hoses and vent lines are a bit different as I recall. The big box 4wd outfits should have all that stuff, hopefully. The extra ground clearance helps when on the rocks.
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