2 cycle oil in diesels - PeachParts Mercedes-Benz Forum

werminghausen · #1 09-18-2007, 05:20 PM

I heard from some friends in Germany that they put 2 cycle oil in their diesels in a ration of 1/250. All taxi drivers seem to do it (In Germany most Taxis are Mercedes Diesels). This is like 8 ounces of oil for 20 gallons of diesel. The 2 cycle oil is to lubricate injection pump as far as I have figured out, may be more. It should burn in a clean way during combustion. Has anyone heard of it and any opinions? Martin

LUVMBDiesels · #2 09-18-2007, 05:26 PM

I can ask my buddy in Stuttgart about it. I have not heard of doing this before, but it sounds logical.

firemediceric · #3 09-18-2007, 06:24 PM

Big discussion about this on the diesel truck forums. When I run D2, I add 1 ounce of 2 stroke oil per gallon of fuel.

Google Moparman. He had a great web site that had MSDS and testing done on many fuel additives. His web-site was shut down due to threats from additive manufacturers, but you can likely find threads in other forums that discuss this

uberwgn · #4 09-18-2007, 06:30 PM

Biodiesel (B2 - B5) is more economical and provides superior lubricity enhancement.

If you're gonna fool around with 2 cylce oil, be certain is meets the latest JASO standard....I think it's "FD".

vstech · #5 09-18-2007, 11:01 PM

2 cycle oil... added to fuel ???
2 stroke oil
it's been discussed before... various opinions

#6 09-19-2007, 03:54 AM

It's a waste of good oil that would be better used in your lawn mower or weed eater.

uberwgn · #7 09-19-2007, 07:06 AM

My diesel has an oxidation catalyst. I'm concerned about what the oily residue might do to that with extended use (of 2 stroke oil). I know many of you don't have that concern with the older cars, but I feel using a little biodiesel is a saner solution to improving lubricity. Does that make sense?

bustedbenz · #8 09-19-2007, 09:36 AM

I don't know of much (OK, maybe water is out, I mean oily stuff) - at all that I'd even notice at one cup to twenty gallons. I think you could throw just about anything in at that rate if it makes you feel good.

#9 09-19-2007, 09:42 AM

Quote:

Originally Posted by bustedbenz

I think you could throw just about anything in at that rate if it makes you feel good.

What can't we burn in our diesels ???

777funk · #10 09-19-2007, 11:03 AM

For what it's worth, some people claim to have driven on heated veg oil for hundreds of thousands of miles. If you get 300k out of a MB I'd consider that a pretty good life.

Of course the engines are designed around diesel.

Now... back to your original question... 2 cycle oil. I really really doubt you could hurt anything if you put a small fraction of 2 cycle oil in from day one until the end of the cars drivable life. For years people have put a quart ATF in the tanks with negligable ill effects.

I will say the diesel sold today is very lacking in lube. Here's my experiment with that statement:

A sales rep from a reputable fuel/oil additive company paid me a visit some weeks ago with a product demonstration. He tested friction using a race and electric motor. He had a lever pressed against the race with a pressure gauge on how much pressure the race had on it. With plain diesel, just the weight of the lever against the bearing race created a loud squeel and made plenty of smoke. Then I had him add my additive (about 30% of veg oil to his diesel). Immediately the smoke and squeel stopped and it was smooth up to about 40 lbs of pressure on the bearing.

I don't think his diesel additives worked as well as my veg. I think that experiment convinced me (and him) of two things...

1. Diesel (ULSD low sulfer) is a poor lubricant.
2. Veg is a MUCH better lubricant.

That doesn't say adding things to your diesel isn't adding carbon, etc. But I will say any moving parts with close tolerances (your injection pump)... needs lubrication. So, I'd bet a good amount, if I was a betting man, that you do more good than harm by adding a lubricant to your diesel. There are diesel additives out there. I'd doubt the 2 cycle oil does any harm. Really veg or most other oils (heated for complete combust) should be fine. The key is that it is completely burning. There's one guy on this forum whos run roofing tar through a kubota engine for an experiment with reports that his engine is fine. But as some people have said, Your Veg Oil Results May Vary.

Heat it to 160F before it burns, clean it throughly, probably won't hurt to run diesel through now and again to clean things out if they are dirty...

Off topic. But many have mentioned other fuels/additives. I think #2D sold at pumps today needs a little help in the lube dept. based on the '_._.' products (remain un-named) salesman experiment.

ConnClark · #11 09-19-2007, 11:23 AM

Quote:

Originally Posted by firemediceric

Big discussion about this on the diesel truck forums. When I run D2, I add 1 ounce of 2 stroke oil per gallon of fuel.

That would be a bit excessive for D2. Most diesel engines are designed to run off D1 with no problems. Since D1 has even less lubricity than even ULSD D2 the point should be mute. If you worry about lubrication, 2 ounces per 10 gallons would still be overkill.

Just remember that when you increase the viscosity of diesel you reduce the ability of the injectors to atomize it.

bustedbenz · #12 09-19-2007, 11:29 AM

Quote:

Originally Posted by 777funk

1. Diesel (ULSD low sulfer) is a poor lubricant.
2. Veg is a MUCH better lubricant.

I normally use Power Service (Grey bottle, doesn't get cool enough for the white one for a few months) - but that stuff is getting expensive and it involves a trip to somewhere where they have it. All I can get now is ULSD. I always drive until nearly empty and then fill to full. So if I started adding one gallon, say, of clean veg oil (like, new stuff) before I filled the remaining 25 gallons or whatever with diesel... am i helping lubricity at that point or am I just gumming up injectors? 1 part to 23 or 24 doesn't seem like that much... would it have any benefit? Or just be adding complications?

tangofox007 · #13 09-19-2007, 11:35 AM

Quote:

Originally Posted by werminghausen

All taxi drivers seem to do it (In Germany most Taxis are Mercedes Diesels).

How many of those cab drivers, do you suppose, are also chemists?

Johnt49 · #14 09-19-2007, 01:39 PM

Check out the chart by Mopar1973Man.

http://www.cumminsforum.com/forum/alternative-fuels-additives-oils-lubricants/4054-first-time-w-2stroke-oil-93.html

This is an interesting thread if you've got the time to read it. A lot of opinion, but some good data also. I'm a believer. The recomended blend is 1 oz 2 cycle oil per gallon of fuel.

Ken300D · #15 09-19-2007, 01:47 PM

I think plain vegetable oil sold in bulk is probably the most cost-efficient lubricant additive. The question becomes how much is needed. A gallon sure seems to be enough. A half-gallon is even easier to carry along.

Some time I would like to run my own experiment in a jar to make sure that vegetable oil disperses within diesel and doesn't all collect at the top or bottom. I use soy oil.

Ken300D