Here's some interesting reading on biodiesel and DPFs:

http://www.nrel.gov/docs/fy06osti/39606.pdf

It says test results indicate significant benefits running biodiesel in DPF equipt engines.

After reading this, I'm thinking my problems may only have been related to the lack of active regeneration until the updated the computer. Or just some bad B20, or B20 blended with LSD not ULSD.

I'd be interested in hearing from someone running B100 in a good running DPF equipt truck. Sounds like it might be ok.

 

E85... Not sure about where you are.. but here in TX E85 is about $.40-.50 cheaper than the low octane gas... E85 is 105 Octane rated.. the power is there with E85.. but the E85 has less BTU's.. so it takes more to get the same amount of HP... On the highway we see a big difference in fuel economy.. sometimes as high as 4 MPG difference.. but in town.. its more like 1-2 MPG... The first 7500miles on our Tahoe saw nothing but E85.. now is more like 25-40% that we use the E85.... When fuel prices are down.. its cheap for the E85.. but when they are high... regular gas is cheaper to run... On long road trips.. its always regular gas... It also can be hard to find... local store has it...

On the Bio-Diesel.. I sat through a few hr presentation on Bio Diesel for work last week... and think someone stated it earlier... They said the biggest issue is that the Bio Diesel out there is not Quality.. and the rating are not accurate... that seems to be one issue that the manufactures are looking at.. thinking that if they mix enough straight diesel with the Bio.. it won't be as bad....
Interested to see how your truck turns out....
Bryan

Edit... GM does not charge any more for the E85 option.. or not yet... Our local dealers order everything with E85 because of that reason....

 

I do not wanna be a guinnie pig with this bio diesel, let alone like I stated eariler that I dont even think any kits are out yet for the6.7. Let alone I dont plan on keeping my stock exhaust. But im fully interested in doing this conversion. Any research on this topic with links will be greatly appreciated!!!!!

As for E85, prices are for the northern states!!!

 

To run biodiesel, there is no conversion needed. You just pour it into the tank and run with it. The veggie oil conversions are just that, the engine or fuel system needs to be changed and driving habits changed to use the fuel.

 

According to that study, B5 and B20 lower the BPT (Balance Point Temp.) at with the passive cat. runs at near 100% efficiency...So, possibly with an active cat. ( as the 6.7 has) the system got confused because of the lower % of pm (particulate matter) and lowered the frequency of regen filling the DPF...???

 

I dont think that is true. I was told that in order to run veggie oil, you will need a seperate tank, and to start the truck, you use your regular ulsd and once it gets to normal operating temp, then switch the switch to veggie oil Which would include a whole new fuel system added ontop of stock system!!!???? As for driving habits needed to be changed, please be more descriptive cause i am unaware of this??? I hotshot 2500 weekly with 20,000 pounds avg.

Also note in order to run b20, you would have to change out filter also, cant use stock

 

I think it is interesting that people who don't own a 6.7 keep answering questions on the 6.7 forum, the older diesel will run on almost anything for quite awhile, those that don't own a 6.7 should step up to the plate, buy a new truck, run your bio whatever and report back. Before then your comments are not revalent to the discussion going on.

 

X friggen 2.

Either 6.7 yourself or shutup on the 6.7 boards. Its called LURKING, you should try it....

(where's my Valium.....)

 

running veg oil is not the same as running biodiesel. what you are describing is WVO. biodiesel is chemically reacted veg oil that you run just like #2, no conversion needed.

 

MY BAD. Maybe i should start another thread. What I really meant was veggie oil to begin with.

HAS ANYBODY RAN VEGGIE FUEL???? or alt. that is cheap or can be homebrewed. Thats what im getting at.

Again, i could care less about better burning fuel. LET IT BLOW BLACK FOR ALL I CARE. I want a cheap/free alternative!!!!

Sorry for not being so descriptive

 

Forget this, NEW THREAD STARTED!!!!!!!!

 

the only reason b-100 and e-85 is more expensive. is the fuel companies. b-100 prices vary with the diesel prices, but the process to make it does not change. as the price of electricity, methanol and lye has not gone up.
methanol will go up, due to being made from petroleum. the other method using ethanol and acid.
as to the original question, i am waiting to see. i'm currently using a 95% filtered wvo, diesel mix in a two tank system. on a idi engine. i start and stop on 95% diesel. and run on heated and 5 micron filtered 95% wvo.
i do loose some power on wvo, but the exhaust is much cleaner.
i will be watching this subject closely, as i'm waiting on a 08 6.7.

 

I may be lurking..... I've been making bio now for about three years and have helped a buddy convert his 7.3 to a veggie burner. From my experience, any truck will need a conversion of some sorts. For example, on his 7.3 we installed a seperate tank, pre-heater for the tank and insulated the lines so oil stayed warm/ hot all the way to the pump.

Now for biodiesel.. I can remember when I first looked into making it and everyone back then was talking about only having the ability to only run B20 in the 5.9, alot of us weighed the savings and decided it was worth the risk. Since then the only problem I've had was a clogged filter (big deal, $13.95, fixed that).

The reason I am "lurking" in the 6.7 section, is that I am considering purchasing one for my wife. She has mentioned on several occasions the interest in getting a bigger vehicle (she currently drives a Prius). I to am interested in any first hand experience with B100 with the new 6.7. However if we come across a deal we can't pass up, I'll buy her the truck and we'll be everyones guinea pig, come this summer.

 

Good quality B100 burns very clean. I bought mine regularly from T-Gill Fuels and ran it in my '98. Smoke was WAY less and when it did smoke it was kind of a light brown color. P7100 loved it and ran much quieter. 'Course that '98 also ran Jet A and some Kerosene a few times too!

 

I guess I'm a "lurker ", I read a little bit on almost all the site. I run bio in my '02 and yep, it runs great. I understand the 6.7 is another animal, but maybe not so different. The biodiesel burns cleaner, but doesn't tolerate the higher rail pressures I am told. Maybe someday I will be able to buy a new truck and then I'll get back with some firsthand knowledge instead of opinions and " I think....." .