Is there anybody out there running 100% biodiesel in their 5.9L common rail Cummins? Just wanted to know if anybody has had problems running 100%. Let me also say that I am fully aware that Cummins only recommends 20% bio so I don't want any lectures on that subject. I just want to know whether I should expect any problems, other than the fuel filter clogging a couple of times. Also, if you are running 100%, how long have you been running it?

 

Nobody is running 100% biodiesel?

 

Bump.....I run 100% but not in a common rail....anyone else??

 

Seems like there is a guy running 100% on an 08 over on another forum. Said he has 10,000 miles on it and no problem. Next thing is good luck finding it. I've called a couple places around here in Tn and they are shut down. The oil guy I get my schaeffers from has called a few and they are shut down as well. I think one said they were watching the price of oil and bean oil was real high. The end product was over $5 per gallon, would help support Americans though not someone across the pond.

Lots of talk about bio from algae though, maybe thats the next great big money maker?

 

I already have a source for the 100% biodiesel and I'm already running it. I haven't had any problems yet, but I have less than 500 miles on the bio. Just want to know if I should expect any problems.

 

I work in BD research and we came to the conclusion that a common rail can't take more than B75 of ASTM grade BD.
No more than B50 if you don't know the feed stock oil for the BD.

What happens with CRI engines is that the higher temps and pressures cause the BD to polymerize (get stringy at the microscopic level). The return fuel goes back to the tank or fuel filter and ends up clogging it up. There is debate that it might also tend to clog injectors. Our brand new '04 only made it 600 miles on refinery grade B100 before the filter clogged up but with the same fuel at B75 no problems for several years.

I've read of guys running B100 in CRI engines without problem but they all were making their own BD and took great pains to produce a clean product with known ingredients. BD made from soy or animal oils tends to polymerize more than feedstocks made from canola or mustard. Unfortunately most of the commercial BD in this country uses soy with a bit of animal fats thrown in.

Randall, my advice to you would be to carry a spare filter and the means to change it or to start filling up with straight #2 diesel for a couple of tanks.

 

Well I work with the guy making the biodiesel and I've seen his setup. He definitely knows what he's doing and does make a good clean quality product. I believe he uses vegetable oil and he says he has run 90-100% biodiesel for a while in his 2006 CTD common rail with no problems yet. Should I trust him and run 100% of his biodiesel in mine?

 

I would trust your co-worker's product much more than any BD you could buy at the pump but still carry a spare filter.
You may want to consider running B90 or so just to be safer, it doesn't seem to take much #2 to prevent polymerization.

 

I would be ok with running B90 but B75 is getting close to defeating the purpose of running the bio since the fuel economy is a little less with the bio. Well, maybe not.

 

I just talked to the guy and he says he has about 15,000 miles on 90-100% biodiesel with his 06 and has had 0 problems. I think I'll trust the guy and go ahead and run it in mine.

 

If his fuel causes $$$ problems for you, are you ok with that? Food for thought.

 

If it starts causing problems in my truck, I will quit running it or run it at only 20%.

 

I have heard that biodiesel can and will eventually eat away the seals in the injector pump. Is there any truth to this?

 

randallp84 , I am trying to resist , your making assumptions all over the place , you should be used to problems ?
This is what gets many in trouble , lots of assumptions with very little info .
I thought about adding some know facts , but you blow them off [ infidel ] , but for others looking .
http://biodieselmagazine.com/article...2290&q=&page=1
Its more of an issue with government & big buis , misleading info , its up to our selfs to try to keep the facts straight .
Our commercial suppliers , no longer make , some of them , others are gouging [ $5.45 gal ] , so we are collecting equipment to make our selfs .
One commercial processor , told us last week , that from what he knew , 90% of the commercially produced bio is being shipped over seas , same with regular fuels & crude , that way they can say there is not enough & charge too much .


Generally dodge started changing out rubber parts around 94 , many are running 100% , not good in common rail ,

 

What assumptions do you believe I am making and how did I blow off Infidel's comments?