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Senior Member
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Join Date: Aug 2018
Location: Ohio
Posts: 1,599
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Senior Member
Join Date: Aug 2018
Location: Ohio
Posts: 1,599
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Adding used oil to your fuel tank. Probably not a good idea. I'm assuming that your injectors will eventually complain, and your O2 sensors, and maybe anything else that is expecting gasoline to be there. Plus your MPG may suffer. But I may be wrong, I haven't researched it or done it. I certainly wouldn't use my vehicle's combustion system as a means of disposing of used oil.
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