giffie

I noticed that some pumps carry "Diesel #2" ..
Anyone know what is the difference between regular Diesel and "Diesel #2" ?
Is "#2" the same as fossil Diesel, and recommended for the GL-350?

N_Jay

If it is marked ULSD, then it is good (or better, as it is not Bio)
If it is not marked ULSD, then it is not for your GL at all.

giffie

Thanks N_Jay.. actually, even 5%-20% Bio diesel blends are also marked as USLD (at least in Illinois).
I think MB stopped selling diesels in IL, specifically because people were wrecking engines by adding 5%-20% bio diesel blends there..

Googling #2 Diesel -they say it is the same as fossil diesel, but more 'concentrated'. So, it does appear that #2 Diesel is OK for MBs

N_Jay

All "road Diesel" is ULSD, both bio and non-bio.
Even the non-bio still has to be Ultra Low Sulfur Diesel (ULSD) to be OK in your MB (No farm fuel)
Bio is not marked "D2".


MB is now selling diesels ion IL.


My dealer (in IL) said he has never seen a problem with a well maintained car, but has seen a few marginally maintained cars with issues.

drgeeforce

Most stations offer fossil-derived #2 diesel or some type of blend of #1 and #2 in winter. Any diesel fuel derived from non-petroleum sources are required to be labeled as Bio-Diesel. Commonly, most diesel found in gas station pumps is #2 Diesel. #2 diesel has the highest energy content and lubricity, it runs great in warm weather. #1 Diesel Fuel has a lower energy content (about 5%) than #2 diesel and lower lubricity because the paraffin (wax) has been removed from the fuel, as this runs better in cold climates.

The newer designation is ULSD as mandated by the EPA has 15ppm maximum of sulfur to reduce emissions. http://www.epa.gov/otaq/fuels/dieselfuels/index.htm

MB has recognized that most states are moving towards biofuels. http://www.mbusa.com/vcm/MB/DigitalA..._Brochure5.pdf

Ultra Low Sulfur Diesel (ULSD) fuel meeting ASTM D975 can contain Biodiesel up to 5 % and certain states have moved over to %5 biodiesel. http://www.scribd.com/doc/96086473/Washington-Plan and here http://www.ct.gov/deep/lib/deep/air/...sel/ulsdfs.pdf

EPA has proposed a mandate to B20 for heavy trucks:
http://www.sidley.com/files/Represen...t%20III%29.pdf

a2j

Diesel #2 is the one you want to be using unless its below 20F outside.

N_Jay

"Highway Diesel" 2 (ULSD), not just any D2

a2j

Don't remember last time I've seen a pump with a non-highway diesel, other than red diesel witch is illegal to use on the roads for any vehicle. So, I'm pretty sure OP was asking about highway diesel #2.

N_Jay

Probably true, but we don't know where he is.


Better safe than sorry.

drgeeforce

While traveling in Minnesota, I did happen upon "B" 2 diesel. I think it is statewide.

Fourdiesel

Different context: B2 is 2% biodiesel, D2 is the long time designation for the 'weight' of diesel fuel.
The 'D' weights are D1, D2, or D3. D1 is lighter weight, more volatile, lower pour point (aka "coal oil" or "stove oil" for a really old timer), D2 is for typical on and off road use in engines up to 500 hp. D3 is usually found in marine applications, it tends to be thick and has very high heating values and must sometimes be heated to flow properly in the fuel system. Engines using D3 are NOT designed for frequent starting and stopping. The next heavier grade of fuel oil after D3 is bunker oil for ships. It is almost as thick as tar and flows about as well.

N_Jay

I have never seen B2, just B5


Thinking "B" 2, may be shorthand for D2 with some Bio. (Probably B5)


EDIT:
Looks like I guessed wrong;
http://www.afdc.energy.gov/fuels/biodiesel_blends.html
There is a B2 fuel.