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Old 02-19-2021, 07:18 PM
 
3,437 posts, read 1,868,316 times
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Does anyone do this? (Put motor oil in the gas tank)
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Old 02-19-2021, 07:20 PM
 
Location: Born + raised SF Bay; Tyler, TX now WNY
8,558 posts, read 4,816,157 times
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No. I like my spark plugs to stay clean and my fuel pump to not get contaminated. Plus I would imagine this would contribute to catalytic converters burnout.
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Old 02-19-2021, 09:16 PM
 
Location: Metro Detroit Michigan
6,980 posts, read 5,465,484 times
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You’re vehicle is not a 2 cycle Lawn Boy lawnmower you never mix oil and gas. We’re do people come up with these crazy questions.
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Old 02-19-2021, 11:03 PM
 
Location: MN
6,609 posts, read 7,219,325 times
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I do it occasionally if I remember in my commercial 23hp lawn mower. My old older school mechanic friend mentioned how he’s always done it with his dirt bikes, sleds, and side by side atv’s and has never had engine problems like all his friends have with similar vehicles.
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Old 02-20-2021, 02:40 AM
 
3,782 posts, read 4,270,846 times
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No, and I don't add gasoline to the oil fill either.
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Old 02-20-2021, 08:02 AM
 
22,687 posts, read 24,700,289 times
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You may screw up your cat, foul your spark-plugs and 02-sensor.
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Old 02-20-2021, 01:23 PM
 
Location: Vallejo
21,941 posts, read 25,307,921 times
Reputation: 19156
No. I put the oil in the gas can, give it a few shakes, and then out the mixture in the gas tank. I don't have any two stroke automobiles though.
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Old 02-20-2021, 02:29 PM
 
28,115 posts, read 63,811,491 times
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Back in the day pre-unleaded gas and Catalytic Converters a lot of old timers would ad Marvel Mystery Oil to fuel tank...

Now I do know people that add Stabil when putting cars away for the winter...
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Old 02-20-2021, 04:21 PM
 
Location: NE Mississippi
25,672 posts, read 17,426,477 times
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Quote:
Originally Posted by Ultrarunner View Post
Back in the day pre-unleaded gas and Catalytic Converters a lot of old timers would ad Marvel Mystery Oil to fuel tank...

Now I do know people that add Stabil when putting cars away for the winter...
And back in those days used motor oil from diesel trucks was "discarded" by dumping it in the fuel tank and burning it as fuel.
Those days are gone - at least here in the US.
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Old 02-20-2021, 05:25 PM
 
3,613 posts, read 7,956,515 times
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Knew a guy who once had a sixties Saab, and he put oil in the gas. Didn't hurt the catalytic converter.
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