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Jeep Wrangler YJ
YJ General Discussion
Oil In The Fuel Tank
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<blockquote data-quote="Gilaguy23" data-source="post: 429162" data-attributes="member: 19498"><p>Is it possible your Grandpa knew it wouldn't be run for some time and mothballed the tank and fuel system with some sort of oil or?? I ask as I've revived a few bikes that have sat for years with the same fuel in the tank for 5 years or longer. The fuel never looked like yours but more camel colored varnish. The tank interior was coated with a thin film a few mils thick where the fuel solidified. What you have looks like permatex gasket maker in the lines. Black tar like yuk.</p><p> A current problem with the newer ethanol laden fuels is the high solvent qualities of them and the fact they will attack,dissolve and eat up fuel system parts of older vehicles. But...your year jeep should have no problem with E10 types fuels, E15 or E85, not sure what would happen. The glob in the tank is something else. Thinking out loud here there is no way engine oil could enter your fuel system. Fuel can enter the oil from a bad fuel pump diaphragm on something with a carbed engine. That's referred to as "making oil" </p><p> Just weird. In the old days we'd dump a quart of 2 stroke oil into 5 gals or gas in the moto bikes and it flowed no problem thru fuel systems. Even had a fuel guy add 1/2 a tank of diesel to a international 345 truck and it still ran.....sort of <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3994" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> smoking and knocking like the devil though. </p><p> On my 91 with TPI there is the factory fuel filter on the frame rail just in front of the drivers side tire. If yours is similar you might change that dude out a couple times and carry a spare just in case there is some more crud in the system. Cant hurt Id imagine.</p></blockquote><p></p>
[QUOTE="Gilaguy23, post: 429162, member: 19498"] Is it possible your Grandpa knew it wouldn't be run for some time and mothballed the tank and fuel system with some sort of oil or?? I ask as I've revived a few bikes that have sat for years with the same fuel in the tank for 5 years or longer. The fuel never looked like yours but more camel colored varnish. The tank interior was coated with a thin film a few mils thick where the fuel solidified. What you have looks like permatex gasket maker in the lines. Black tar like yuk. A current problem with the newer ethanol laden fuels is the high solvent qualities of them and the fact they will attack,dissolve and eat up fuel system parts of older vehicles. But...your year jeep should have no problem with E10 types fuels, E15 or E85, not sure what would happen. The glob in the tank is something else. Thinking out loud here there is no way engine oil could enter your fuel system. Fuel can enter the oil from a bad fuel pump diaphragm on something with a carbed engine. That's referred to as "making oil" Just weird. In the old days we'd dump a quart of 2 stroke oil into 5 gals or gas in the moto bikes and it flowed no problem thru fuel systems. Even had a fuel guy add 1/2 a tank of diesel to a international 345 truck and it still ran.....sort of ;) smoking and knocking like the devil though. On my 91 with TPI there is the factory fuel filter on the frame rail just in front of the drivers side tire. If yours is similar you might change that dude out a couple times and carry a spare just in case there is some more crud in the system. Cant hurt Id imagine. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Oil In The Fuel Tank
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