[SKITE]

hey all--
I'm thinking of purchasing a new 2500 with the Duramax. I would like to run biodiesel (anywhere from B20-B100). I live in Michigan so I realize that B100 is not likelhy to work in the colder months. Should B20 work during the winter? or will it glob up?

any suggestions on aftermarket parts that will increase fuel effeciency, help maintain the engine while running biodiesel, and/or help my engine out in any way.

I admittadely know very little about engines, but am looking forward to learning more.

Tripp

 

[JMD]

IMO,,, if you are looking to buy a Diesel, then GM is the way to go. Best trucks on the road!

 

[aggar]

I wouldn't run any bio in the winter especially if you're in MI. I run B10 down here and my truck very rarely smokes. IF you're getting the new 07 style with the new LMM motor you're supposed to run the new Fuel they have out. I'd buy the 07 classic if you can still find one with the LBZ. There are all kinds of things you can do to mod your truck and make it perform a lot better. I haven't gotten to that yet but I'm working on it. Welcome to the site and don't be affraid to ask anything.


Rayn

 

[SKITE]

does running traditional diesel result in engine problems in the new '07s designed for the new diesel? i do like the new body style and was leaning that way.

 

[dundee204]

I just ordered a new LMM 10 days ago. Yesterday I spoke to to the Fleet manager and he nixed bio fuel. GM recommends the new low sulpher # 2 and a new bio mix 10% which is supposed to be available later this year, but I wouldn't hold my breath for it to come soon. The battle right now is to have the major oil companies improve the grade of diesel to what the Europe is using. Much cleaner and 50 cetan. That alone will improve HP.

The problem with LMM and bio is the new hi-pressure injectors don't like it and that the new particulate filter heat goes ballistic when the motor goes into re-gen mode to burn the particulate in the filter. If the oil companies clean up the diesel to European standards, The LMM is supposed to see a 17%-20% perfomance improvement and emissions six times better than a gas burning E80 6.0L. The earlier engines would see a 8%-12% improvement.

As I said, this info came from a GM Fleet Sales Manager, sounds good but may be optimistic.

 

[dundee204]

This is a scan of the 07, LMM GM Manual. It's for Canada but describes US also.



What Fuel to Use in Canada
Notice: Use of diesel fuel other than Ultra
Low Sulfur Diesel (15 ppm sulfur maximum) or engine oil other than low ash CJ.4 oil
will cause permanent damage to the DPF
and related components. This damage would not be covered by your warranty.
The emission control system requires the use of diesel fuel with ultra 10w-s\Jlfur (0.0015% by weight, or 15 ppm, maximum) content. Both Ultra Low Sulfur Diesel and Low Sulfur Diesel fuels are available in the United States and Ultra Low Sulfur Diesel fuel is available in Canada. However, only higher sulfur diesel fuel is available in Mexico.
At a minimum, the diesel fuel you use should meet the latest version of specification CAN/CGSB-S.517 (ULS) in Canada. In addition, the Engine Manufacturers Association (EMA) has identified properties of an improved diesel fuel for better engine performance and durability (FQP-1A). Diesel fuels corresponding to the EMA description could provide better starting, less noise, and better vehicle performance. If there are questions about the fuel you are using, contact your fuel supplier.

Canadian fuels are blended for seasonal changes; Diesel Type "A" fuel is blended for better cold weather starting (below O¬?Fer -18¬?C); however, you might notice some power and fuel economy loss. If Type "A" fuel is used in warmer temperatures, stalling and hard starting may occur. Diesel Type "B" fuel is blended for temperatures above OaF (-18¬?C).
It is acceptable to use diesel fuel containing up to 5% biodiesel (B5), but the final blended fuel must meet the same specification, CAN/CGSB-S.517 (ULS) in Canada, as other fuels used in your vehicle, and the biodiesel used for making this fuel must meet the latest version of ASTM specification' D 6751. Biodiesel is produced from vegetable oils or animal fat that have been chemically modified to reduce the possibility of damage to the fuel system and engine. Higher concentration (I.e., greater than B5) biodiesel-containing fuels or the use of unmodified bio-oils blended into diesel fuel at any concentration is not recommended and could damage the fuel system and engine. Such damage would not be covered by your warranty. If there are questions about the biodiesel-containing fuels you
are using, contact your fuel supplier. .