ULSD question - PeachParts Mercedes-Benz Forum

tankdriver · #1 10-04-2007, 10:58 AM

Can I/should I add a gallon of veg oil when I fill up to aid lubricity?

pawoSD · #2 10-04-2007, 11:03 AM

No.

If you want to add a lubricant, use something like Redline Diesel Catalyst. (pour in 1/4 or 1/3 of a bottle per fillup or something)

Veg oil will cause waxing and other bad things. Use a proper additive. Especially being in OH, its going to get cold soon. Veg oil would clog the filters very quickly when it gets cold.

Biodiesel300TD · #3 10-04-2007, 11:03 AM

No sure veggie oil will give you much increase in lubricity. I would try a dab a biodiesel if you can find it. People have also been using fresh clean motor oil as well. Biodiesel will be a cleaner option. It will start to clean out your fuel system as well.

#4 10-04-2007, 11:11 AM

Quote:

Originally Posted by tankdriver

Can I/should I add a gallon of veg oil when I fill up to aid lubricity?

If it makes you feel better.

Actually, a legitimate fuel additive is probably a better idea if you feel like you have to add something. Of course, you can just use diesel fuel like the rest of us.

BioBens · #5 10-04-2007, 12:54 PM

Among the many great things about MB diesels is that the IP is lubricated primarily by oil from the engine. The prevalent Bosch VE-type IPs that are having ULSD-related problems (used on VW, BMW, Dodge, etc) depend entirely on fuel for lubrication.

TMAllison · #6 10-04-2007, 01:16 PM

Quote:

Originally Posted by BioBens

Among the many great things about MB diesels is that the IP is lubricated primarily by oil from the engine. The prevalent Bosch VE-type IPs that are having ULSD-related problems (used on VW, BMW, Dodge, etc) depend entirely on fuel for lubrication.

Additionally, as I understand the ASTM requirements the lubricity of ULSD as compared to LSD fuel did not change.

F18 · #7 10-04-2007, 01:32 PM

As Terry mentioned......the specs on lubricity should not have changed according to the ASTM regs. I would just go on with your business and not worry about it. ULSD is of the cleaner quality used in Europe for numerous years.....and they have done so without problems.

lkchris · #8 10-04-2007, 01:44 PM

You don't need extra lubricity.

Unless it's a personal thing.

Your engine doesn't, that is.

jkoebel · #9 10-04-2007, 01:45 PM

Quote:

Originally Posted by F18

As Terry mentioned......the specs on lubricity should not have changed according to the ASTM regs. I would just go on with your business and not worry about it. ULSD is of the cleaner quality used in Europe for numerous years.....and they have done so without problems.

Isn't Eurodiesel of a higher cetane number, due to their better refining process, though?

Motorhead · #10 10-04-2007, 01:47 PM

I am also on the Turbodieselregister.com and guys and now my self are buying 2 stroke oil at Walmart and adding it. I am adding 16oz to a tank of 34 gallons on my new Dodge. It comes out to $1.00 a tank as the gallon jug of oil is $8.00.
Yes the pumps on the mercedes are pressure lubricated but the injectors are not nor the small valves on top of the injector pump before the injector lines.

TMAllison · #11 10-04-2007, 02:09 PM

The major thing that has changed is perception; not lubrication.

F18 · #12 10-04-2007, 02:16 PM

Quote:

Originally Posted by jkoebel

Isn't Eurodiesel of a higher cetane number, due to their better refining process, though?

Yes....but you would still find varying cetane from country to country and brand. But lubricity of the fuel along with the lower sulfur content seemed to be more highly regulated from what little I have experienced and read.

wrench56 · #13 10-04-2007, 02:28 PM

I use a pint of Marvel Mystery oil per fill-up and about 3/4 oz of power services diesel additive regardless of whether I use ULSD, regular diesel, or turbine fuel. Don't notice any difference in the 350D between them. Any light oil will help the lubricity aspect.

jkoebel · #14 10-04-2007, 02:31 PM

Quote:

Originally Posted by wrench56

I use a pint of Marvel Mystery oil per fill-up and about 3/4 oz of power services diesel additive regardless of whether I use ULSD, regular diesel, or turbine fuel. Don't notice any difference in the 350D between them. Any light oil will help the lubricity aspect.

Only 3/4 oz? I dump a half-quart of Diesel Kleen into my tank each fill-up. (I suspect, by my mathematical powers, that I gather +6 Cetane numbers this method.)

toomany MBZ · #15 10-04-2007, 02:44 PM

My .02, don't know if European fuel has a higher cetane rating or not, the info on wikipedia indicates no benefit over 50, in winter I fill up with 45, highest available locally, and usually add Power Service also, boosting it up more. I'll throw in some ATF just for grins. Don't know if I'm over doing it!