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Odd recommendation by Mechanic

Old 11-04-2016, 11:29 AM
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Default Odd recommendation by Mechanic

I have a 2005 Yamaha F250. The local mechanic recommended adding a small amount of 2 stroke oil to the fuel. His position is that it helps lubricate everything and will burn clean and leave no residue and not cause any negatives. I have no idea what ratio he is talking about.

Sound weird to you?

I think I am going to look for another mechanic, you agree or am I being overly cautious?

Any negatives to this?

~Scott
Old 11-04-2016, 11:33 AM
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Nonsense

It will foul your plugs.

Get a new mechanic.
Old 11-04-2016, 11:44 AM
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http://www.ls1.com/forums/f48/been-testing-oil-91206/
Old 11-04-2016, 11:44 AM
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Not going to harm anything. Not going to help much either. I have run a heavy 2 stroke mix thru a few engines with sticky valves and a marvel mystery oil/diesel mix instead of oil to free things up tho. Mind you i would not do this on an engine with a catalyst.
Old 11-04-2016, 11:48 AM
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The manual for my Mercruiser 8.1s recommends fogging the engines by putting a little two-stroke oil in the fuel filters. That tells me it probably won't hurt them. It hasn't hurt my lawn tractor as my wife keeps putting two-stroke in it (I'd gladly sacrifice a mower to keep my wife mowing the lawn). I know guys who get rid of their leftover two-stroke fuel in their car, no problem. Modern car engines might have a problem with passing oil through the catalytic converter, but otherwise no problems.
Old 11-04-2016, 11:58 AM
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I do it in my diesel engine, specifically to lubricate... but thats a little different
Old 11-04-2016, 12:09 PM
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Some of the commercials run Marvel Mystery Oil in their gas. I tried it myself. Didn't notice anything different. Since I refuel with 10% ethanol, I do put the requisite amount of Stabil Marine 360 in the tank.
Old 11-04-2016, 12:28 PM
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This is actually a very common practice. It is using it as an inexpensive upper cylinder lubricant. At the ratio you will mix it, won't hurt anything even if you have catalyst equipped engines.

I have run 2 stroke in a light mix in my tractor, lawn mower, golf carts, and my boat. You could mix up to a quart per 6 gallons and be within the fogging mix for Mercury Marine. It will help lubricate the fuel pump, carb/injectors, and help keep the rings sealed tight.
Old 11-04-2016, 12:38 PM
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It's used to keep the injectors from sticking when you don't run the boat for a while. You're talking like 1oz to 5 or 10 gallons, the mix isn't much, just enuf to lubricate the gas. It's why its mainly done in diesels cause the oil runs the injectors not a separate pump running the injectors, so it's added to the fuel to lubricate the fuel side of the injector.
Old 11-04-2016, 12:40 PM
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Originally Posted by 30West View Post
The manual for my Mercruiser 8.1s recommends fogging the engines by putting a little two-stroke oil in the fuel filters. That tells me it probably won't hurt them. It hasn't hurt my lawn tractor as my wife keeps putting two-stroke in it (I'd gladly sacrifice a mower to keep my wife mowing the lawn). I know guys who get rid of their leftover two-stroke fuel in their car, no problem. Modern car engines might have a problem with passing oil through the catalytic converter, but otherwise no problems.
Same here.
Old 11-04-2016, 12:43 PM
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Originally Posted by Paulswagelock View Post
This is actually a very common practice. It is using it as an inexpensive upper cylinder lubricant. At the ratio you will mix it, won't hurt anything even if you have catalyst equipped engines.
.
This.
Old 11-04-2016, 05:16 PM
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Thanks guys

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