I am just getting into the biofuel market and was wondering if there is any concrete conclusions on running b100 in an 08 duramax.
IE:somehting about DPF , lots of fuel filters and post injection?
I live in peoria, AZ so cold weather not going to be a problem.
any assistance to my possibly reduntant question would be greatly appreciated.

PS: also have 07 duramax same or different issues?

If you have a DPF still on I would not run b100. I dont believe you will have the necessary ignition temp of the biodiesel when it is sprayed into the DPF for soot cleaning. Ive been running 50% for over 1000 miles now with no problems. I think that is a safe level with a DPF.

I forgot to say that I have an 08 GMC Sierra LMM with 6000 miles on it now. My only issue was a clogged fuel filter in about 50 miles. I replaced it and no problems since.

The Duramax does NOT spray diesel fuel into the DPF; that would be the FORD. The lines you see running into the DPF sense the internal pressure, therefore sense when the filter is full and trigger a regen.

Biodiesel has less BTU per unit volume than petro-diesel but that is the only difference. People that slept through science class in the back row jump to all kinds of conclusions.

They don't spray into the DPF, they spray into the cylinders which is worse. See:
Warning:danger of using VO/>B5 on many vehicles >=2007
and:
B100 use in post-injection modern diesels, leading to high engine wear

If your '07 Duramax has the LBZ engine (early '07's did) then it doesn't have the DPF. It does have a post injection event. Under what conditions the post injection takes place i.e. barometric pressure, altitude, egr open or closed IAT's I don't know. I have the LBZ engine and run a fuel additive called B-99.9999999 . I use a program called EFI Live link to shut off the post injection.

My question is, and I know the laws, this is not a law question but a enviromental question if we're running bio why do we need the DPF, Cat, etc.etc. The DPF was tested with dino diesel, not bio. Until the EPA concludes testing of the DPF system with bio shouldn't we remove it? The EPA is aware of Bio I'm sure. Why make us put DPF's on our diesels before testing is complete?

EFI Live allows you to remove it and turn all DPF related events off so you have no unecessary regens and no codes.

I've ranted I know but those are my thoughts on the subject. Still a free country right?