This may get a little lengthy but I want to be sure and get all the details in. I started using biodiesel about 4 months ago. The supplier here was using 100% soy based biod at that time. Recently they starting getting biod that used a base stock of 50% soy and 50% chicken fats. The first time using a b20 mix of this stuff my truck got the check engine light and the 1093 code that is discussed often on this board. Up until this time I had never got the 1093 code either with the 100% soy biod or conventional diesel. I reported this problem to the supplier. They notified me that they had recieved a bad batch of fuel that had clogged the filter on their pump and they had sent back what they had left. The went on to say that their supplier added extra filtering equipment so the problem would not happen again. I changed out my fuel filter and drove the truck for 2 weeks on conventional diesel with no problems. This past week I went back and filled up another tank of B20. I went about 20 miles before I had a 1093 code again.

I'm planning on notifying them tomorrow. Anyone else see anything like this?

what is the code 1093 for?????

low fuel rail pressure or something like that.

clogged filters?????

I got the same code running bio but it was actually my injectors. I was running B99 then. I have run B20 and B40 since getting new injectors but not B99.

if your using bio after using petrodiesel the bio will clean out the residue from the petrodiesel and may clog you fuel filter or possibly your injectors. the bio brains recommend that you change you fuel filter after you start using bio. journey something website do a google search for it with biodiesel. later

Yes, that's a well known issue. However it is not an issue with a truck less than a year old as mine is. This is without a doubt an issue with the fuel. With this chicken fat based biod I could literally make the truck throw a 1093 code just by stomping the pedal. As soon as a filled a tank of conventional diesel the 1093 code issue vanished. BTW the fuel filter was changed just in case but the problem persisted. I'm hoping the supplier here will switch back to 100% soy biod some time soon.



if your using bio after using petrodiesel the bio will clean out the residue from the petrodiesel and may clog you fuel filter or possibly your injectors. the bio brains recommend that you change you fuel filter after you start using bio. journey something website do a google search for it with biodiesel. later

I was told that the chicken oil was the stuff to stay away from as the fats can congeal. I've blended 5 gallons of b100 soy into my tractors at b20 and b50 rates with good results, and the smell is much nicer!

I didn't know there was animal fat based bio commercially available yet. The bio is going to have different gel points based on the fatty acids it is based on. Animal fats are generally saturated and have a high melting temperature, therefore the bio made from them is going to have a higher gel point and higher viscosity. I would be leary of running a high percentage of animal fat based bio without some provision for heating the fuel a bit.

One of my suppliers of waste oil that I run in the benz was a chicken restaurant and I could always tell which fryer the bucket I was pouring came from. The french fry fryer always had thinner oil than the chicken fryer-even though they started out as the same oil.

The stuff I get is from chicken fats. Commercially made.

Maybe sumer fuel. It seems to have a cloud point in the 60's.

I am running B75 or so. Been to B95. It is always over 65F here in the summer.

I'm certainly staying away from it from now on. My supplier told me today they will be switching back to 100% soy bio. They may have had others with problems besides me.

Every tank of B20 chicken juice I ran gave me 1093 problems. The last one was real bad. It would 1093 anytime I stomped the pedal. No such problem with any conventional diesel. All my soy based B20 (and even one soy based b100) were fine as well.

John
I was told that the chicken oil was the stuff to stay away from as the fats can congeal. I've blended 5 gallons of b100 soy into my tractors at b20 and b50 rates with good results, and the smell is much nicer!

The problem is with low quality biodiesel. Not biodiesel made from chicken fat.

Chicken fat will meet ASTM spec just like anything else, if done properly. My guess is that your BD maker did a half ass job on the reaction, and left a hefty amount of glycerine in the fuel. (Thus its thickness) Did the problems seem more common when the truck was cold? Because the fuel temp is up to 130+F after 30 minutes of driving.....

Ive always said, it is a good idea to put some of the fuel in a clear sample jar and observe it at different temps for a bit before adding to the tank.

Good luck with the soy, it seems to be the easiest to make.

While it is certainly possible excess glycerin could be to blame, biodiesel from any animal fat is going to be more viscous than that made from unsaturated plant fatty acids. I am sure once the fuel temp comes up you would be fine, but on a cold engine I could see it causing issues. Personally I would be a little uncomfortable running straight bio from animal fats through the HPCR system of the duramax; a blend with soy or canola biodiesel would be better IMO. Now in the benz I will run just about anything, on the diesel or the veggie side, but that is a different story.

The problem with chicken fat is that sometimes you cannot get away from it. The supplier of virgin soy bio that Manny and I buy from uses some chicken fat...I do not know how much...and it is completely legal to still call the stuff Virgin soy.

I got the impression that it was made from 100% chicken fats?!

In the tax papers I got, it says that chicken fats alone can qualify as "virgin."

Crap!!!

Then why not get the recycled stuff and save some money...no?

I don't know how they can call it "virgin soy" unless it is mostly (> ~75%) soy. Now they could surely call it "virgin" if it is made from any amount of chicken fat.

What I have read indicated there wasn't much use of animal fats yet in commercial production, but the industry was moving that way. I would rather they stick with vegetable oils for now, as it would seem the risk factor with animal fats may be higher. Doesn't seem smart to run any extra risks when you are still struggling to get the public to trust your product in the first place.

Habanero...you are dead on. The risk is much higher with the animal fats....here we are trying to get the fuel mainstream and what you do not want is people who try it for the first time and have problems.

The one supplier north of me specifically states no animal fats in his Purchase orders...and sure enough someone sold him some and he had to reimburse his clients whose trucks stalled and had to be towed. Even though he was reimbursed by the producer...his name was dragged through the mud.

To be honest, I have only heard from one source (not BOB) that the stuff IWP makes comes from chicken fats. Who knows the truth. I can only imagine how reluctant Bob might be with me if i tried to talk to him about this.

I do know for a fact that the first drum I bought (JAN 05) was not chicken fats. It was b100, and had a very low cloud point.

I dont even know where the chicken fat comes from.

But I agree with the both of you about how now is the time to get it right. Just like GM and their diesels in the 80's. They got it wrong, and it costed them dearly for 20 years.

I hope the biodiesel.org giant is aware of this too.

According to TED...he brought up this matterr with some sort of Biodiesel person from that organization.....and they were pushing the recycled stuff.

He wanted to have strict definitions in terms of Virgin soy being 100% and have the recycled stuff state what it was made from......he claims this fell on deaf ears....they were not interested in hearing it.

I do believe you can use the animal fats...but in a restricted sense(Temperature of the region) and the processing has to be good.

In my case the temperature did not seem to make a difference. I got the 1093 code whether the engine was hot or cold. Plus the outside temperature was in the high 90's. I monitored my fuel rail pressure during this with my Predator programmer. While running the chicken juice under fulll throttle my trucks desired rail pressure was 160MpA. The actual pressure was never over about 130MpA and this is when the code set. After filling with conventional diesel the desired and actual pressures would stay near the same.

While it is certainly possible excess glycerin could be to blame, biodiesel from any animal fat is going to be more viscous than that made from unsaturated plant fatty acids. I am sure once the fuel temp comes up you would be fine, but on a cold engine I could see it causing issues. Personally I would be a little uncomfortable running straight bio from animal fats through the HPCR system of the duramax; a blend with soy or canola biodiesel would be better IMO. Now in the benz I will run just about anything, on the diesel or the veggie side, but that is a different story.

According to TED...he brought up this matterr with some sort of Biodiesel person from that organization.....and they were pushing the recycled stuff.

He wanted to have strict definitions in terms of Virgin soy being 100% and have the recycled stuff state what it was made from......he claims this fell on deaf ears....they were not interested in hearing it.

I do believe you can use the animal fats...but in a restricted sense(Temperature of the region) and the processing has to be good.

The trouble with stating where recycled oil bio comes from is you are hard-pressed to know. The truck might go around to a dozen different restaurants all using different oils (canola, peanut, hydrogenated, etc.) so who knows what you are getting. About the only thing you can do is test the bio after its made and post the cloud point, viscosity, etc. I personally like the idea of using waste oil to make the bio, it should be cheaper and recycling is always good. But, you also have to know the integrity of the product. I think (hope) there will come a time when we will have grades of biodiesel just like gasoline. Virgin soy/canola bio for the duramax (and other HPCR engines) and the cheapest stuff for the older IDI MBs and such would suit me fine.

My guy says french fry oil is what you want if you do the used oil stuff. Personally, I'll stick with new soy based and b20 (maybe 50) until I see reason to change.