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  #1  
Old 05-03-2007, 02:17 AM
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2 stroke oil

anyone ever add a little, like 12oz to a whole tank? I have the last 2 fills, seems to run a little bit smoother. Any one know if this is bad? Just thinking that with ULSD, this could help.
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  #2  
Old 05-03-2007, 02:23 AM
ForcedInduction
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There is no point to adding it unless you need to get rid of it. It won't hurt anything, it's just a waste of expensive oil.

ULSD won't cause any harm on it's own so don't worry about it.
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  #3  
Old 05-03-2007, 02:28 AM
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Ahh...the placebo effect.
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  #4  
Old 05-03-2007, 02:38 AM
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like i said, seems to. I did not straight claim that it did - thats why i'm asking. So here is a different question, why do you add 2stroke oil for 2 stroke engines?
it's to, "lubricate" something right? Like I said. I am NOT claiming that it really does anything, just curious if anyone here had any facts or experience is all.
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  #5  
Old 05-03-2007, 02:45 AM
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2-stroke oil lubricates the crankshaft, rod, cylinder walls and piston pin. Since the fuel passes through the crankcase before it goes into the combustion chamber, there is no oil sump like on a 4-stroke engine. Therefore, the engine has to be lubricated by something. Gasoline is an extremely poor lubricant so oil must be mixed into it or the engine would seize. The oil in the gas coats everything as it passes through the crankcase.
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  #6  
Old 05-03-2007, 07:03 AM
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Arrow I wonder about the gunk it causes.....

Quote:
Originally Posted by ForcedInduction View Post
2-stroke oil lubricates the crankshaft, rod, cylinder walls and piston pin. Since the fuel passes through the crankcase before it goes into the combustion chamber, there is no oil sump like on a 4-stroke engine. Therefore, the engine has to be lubricated by something. Gasoline is an extremely poor lubricant so oil must be mixed into it or the engine would seize. The oil in the gas coats everything as it passes through the crankcase.
Have any of y'all ever cleaned the carbs on an outboard motor that has been put away without draining the carbs or adding a fuel preservative??? That 2 stroke oil leaves quite a residue, just like it's supposed to do....read Forced's description of the 2 stroke lube process.....

If you must use an additive, look into the Power Service line of Diesel Fuel additives.....will be way cheaper and more beneficial to your engine.....

SB
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  #7  
Old 05-03-2007, 08:08 AM
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I had a case of 2 stroke boat motor oil left over from a boat I had. Added that to my tank and ran it. Only difference I noticed was the smell and a bit more smoke.

Cheers,

Bill
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  #8  
Old 05-03-2007, 10:57 AM
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Exclamation Debate

Here is a 67 page and counting debate about using 2 stroke oil to lubricate your injection system: http://www.cumminsforum.com/forum/alternative-fuels-additives-oils-lubricants-sponsored-holland-court-sales/4054-first-time-w-2stroke-oil.html

It's mainly about protecting onld cummins engines from ULSD effects on the injection pump over long term. I don't know if it's the same for old MB diesels but the general consensul there is that this could be beneficial to older Diesels.
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  #9  
Old 05-03-2007, 11:07 AM
Craig
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When did everyone with an internet connection decide they were a lubrication engineer? Why is there always a "consensus" that running just about anything except diesel fuel in a diesel engine is "beneficial"?
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  #10  
Old 05-03-2007, 12:03 PM
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Quote:
Originally Posted by Craig View Post
When did everyone with an internet connection decide they were a lubrication engineer? Why is there always a "consensus" that running just about anything except diesel fuel in a diesel engine is "beneficial"?
It's a new frontier Craig.

Cheers,

Bill
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  #11  
Old 05-03-2007, 12:08 PM
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Because that "might" catch the atention of a real engineer.

Second it's clear enough that today's diesel fuel is different from what we had a few years ago. Maybe something has to be done about this.
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  #12  
Old 05-03-2007, 12:09 PM
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I always loved that smell of the exhaust from a two stroke, outboard motor. It brings back fond memories of summers as a kid on the water.
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  #13  
Old 05-03-2007, 12:47 PM
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Quote:
Originally Posted by Dee8go View Post
I always loved that smell of the exhaust from a two stroke, outboard motor. It brings back fond memories of summers as a kid on the water.
Or a ride on a dirt bike.

Cheers,

Bill
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  #14  
Old 05-03-2007, 02:08 PM
Craig
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Quote:
Originally Posted by Meridivs View Post
Because that "might" catch the atention of a real engineer.

Second it's clear enough that today's diesel fuel is different from what we had a few years ago. Maybe something has to be done about this.
As a real engineer, I would recommend running your engine on the fuel it was designed for, #2 diesel. ULSD does meet the ASTM fuel standard (D-975) for lubricity, although additional additives were required to meet that requirement. The required additives were added "upstream" of the pump. If, for some reason, you feel compelled to add something extra to your fuel, try one of the additives specifically designed for diesel fuel.

Has anyone seen a recommendation from MBUSA to add anything to pump ULSD? Last I heard, they were recommending straight #2 diesel or up to B5 biodiesel. I understand that it's fun to "experiment" but sometimes we should just listen to the folks who designed the engine.
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  #15  
Old 05-03-2007, 07:05 PM
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Quote:
Originally Posted by Craig View Post
Has anyone seen a recommendation from MBUSA to add anything to pump ULSD? Last I heard, they were recommending straight #2 diesel or up to B5 biodiesel. I understand that it's fun to "experiment" but sometimes we should just listen to the folks who designed the engine.
I highly doubt MB really gives a crap what we do with our 20yr old diesels. Nor do I think they are doing any kind of R&D on possible damage to our antique fuel systems. MB would be perfectly happy if ULSD killed ALL of our IP's. We are all "potential customers" after all. Adding a couple of ounces of 2-cycle oil to each tank will not hurt anything. It MAY help but I doubt you will see anyone, MB, aftermarket fuel additive supplier, etc. admit that 2-cycle would be beneficial. It would take money out of their pockets. RT
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