If I read my manual right, it says that bio-diesel can be used at a maximum of 5%. That's nothing. 10% is only 3.5 gallons. Am I missing something here?

I have actually found one store in the San Diego that carries it, and it's a few cents more than #2. I kinda want to give it a shot.

From everything I have heard or read on the Internet, you should be able to run up to a B50, or 50% in an 05 with no problem. Some folks would say you could run B100 or 100% bio without any problems.
Most service stations that market bio sell B20 which seems to be becoming the "standard" for mass-marketable bio.
http://www.b100supply.com is one of the better sites I have found for info on Bio, but do a google and you'll get all the info you need to make an informed decision.

I dont know what, if any, effect running a higher percentage than the manual says is acceptable may have on your warranty.

From the things that I have read (and depending on who you trust) you can run B100.... it's the weasel attorneys that put the b5 in the manual. With fuel prices rising as they are I have been looking at bio myself...

I'm a little confused here. Does this mean that I can fill my truck with the bio, or should I just pump in 5 gallons of it along with 30 or so gallons of #2?

You can put in any % you want , it only maters for trucks made before about 94 becouse of high %[ sbove 20%] making the rubber hoses & seals soft sfter 94 no problum. This university did a lot of testing with the 5.9 cummins
.http://web.missouri.edu/~pavt0689/biofuel.html
Biodiesel-Biofuels Research

We experienced problems running B100 in our '05 at work. Major part of my work is BD research. What happens is that the higher pressure of the common rail changes the structure of the BD returned to the tank. It makes it stringy so that on it's return trip though the filter it tends to clog.
No problem running B20 though.

Originally posted by DirtEater
I'm a little confused here. Does this mean that I can fill my truck with the bio, or should I just pump in 5 gallons of it along with 30 or so gallons of #2?

At public pumps it's a premix percentage with regular #2. Example, B5 = 5 % Bio diesel blended with 95% #2. B20= 20% and so on. DC and most manufacturers say that a 5% blend is all that is safe to use (to still be covered by warranty).
If you have B100 Pump you will need to do the math if you don't want to run 100%.

Thanks PJ. Now I understand. I'm pretty sure that our (1) station sells B20. So, is it okay to fill up or just go half and half to bring it down to 5% or thereabout.

If you run any of the Bxx diesel mixtures, and you have not done it before, should I still add my PS+MMO mixture???? The bio is supposed to have much better lubricity and cetane correct???? What do you all think???

i've run B20 in my truck wth no issues... other than it costing more :(

I have to stay out of the specifics on Bio, I don't have a pump within 50 miles and have never ran it. I just know some of what most folks on DTR know, through reading articals and threads. Good luck with it, (from what I've heard) it's nothing to be afraid of, it's our friend!:D

Originally posted by Dorkweed
If you run any of the Bxx diesel mixtures, and you have not done it before, should I still add my PS+MMO mixture???? The bio is supposed to have much better lubricity and cetane correct???? What do you all think??? With BD you can skip the MMO but should run PS or any other anti gel additive in the winter. Since BD gels a few degrees higher than straight #2 the general recommendation for protection down to minus 35F is to increase the amount of anti gel by the same percentage over the recommendation on the jug as the percent BD you are running.
i.e. if you are running B100 add twice add much anti-gel, if you are running B20 add 20% more than the label says.
If you live where it doesn't get cold skip the additives entirely.

What plugs the fuel filter is the accumulated dirt from the petro diesel , after maybe a couple of tank fulls and couple of filters the system would be cleaner than any fuel system cleaner, the next is if you get into cooler temps. then you need regular additives for anti gell.

Originally posted by John Faughn
What plugs the fuel filter is the accumulated dirt from the petro diesel This is true but not the case with a common rail. We did extensive lab work to determine what was causing filter plugging when running B100, the high pressure/heat was causing a physical change to the structure of the BD that was readily apparent under a microscope. This was with refinery produced BD, not backyard stuff.

Thats anougther reason I like the older cummins, and counting.
This site may be of help if your doing research , unless your only doin it for those newfangled CDT.
http://web.missouri.edu/~pavt0689/biofuel.html
Biodiesel-Biofuels Research

Thanks John.
We have moved on from testing BD production methods and the use of it in different engines to oil crops and how different fertilizer, irrigation, etc, inputs effect oil yields. We are finding the addition of sulfur fertilizer can make a huge difference in oil yield.
Also experimenting with many new oil crops that most people have never heard of. There are couple that look much better that the traditional soybean and rape seed oil that most BD is derived from.

It's interesting that the guys on the economics side of things have figured out is that a BD refining business won't make it when approached from just a fuel standpoint. The main emphasis needs to be as a livestock feed supplier, fuel has to be considered only a byproduct.

Bill, thanks for posting the info on the prevention of gelling with bio. Just the info I have been looking for. I understand the formula you explained, just wondering how this was tested. Did you do the tests yourself or was the information passed on to you.

I'm not challenging your information, I would just like to hear more about it. I am personally doing some freezer tests on b100, and would like to get my hands on any info I can.

I have not had to buy diesel in about 2 months, and my tank is full :) , want to try and run as much bio as I can thru the winter months. BTW, what anti-gel (brand) do you feel performs the best?

Thanks, Kevin

Kevin, the additive info came from a BD refinery in Montana after extensive testing.
I've been using Power Service with B20 for the last four years with no gelling even at minus 35. Usually stock up on the PS when I see it on sale.

Thanks Bill, I use powerservice as well and am happy with it, however, I really want to push the envelope this winter and run as much bio as possible.

Gonna keep plugging along with the freezer experiments. Thanks, Kevin

My son works for Fort Leanordwood. The have been running B20 but the ambulances are Ford. Ford issued a directive that they had to stop.