I asked Dodge Ast. SM today if its Ok to use B-20 in my 06 being Cummins said it was OK. He said as far as he knows Dodge has not yet approved the use of B-20 in our trucks and if I had warranty on my truck to only use B-5. So CYA if you use B-20 and you still have any warranty left on your truck and if you get someone at a dealer saying its Ok to use B-20 then get it in writing.

 

Dodge sent me a magazine (Dodge Spring / Summer 2007) and it said that Dodge had approved B20 for military,fleets,school busses,and gov trucks only (when properly equipped). But they also said that factory fill is B5 for all diesels since January. They are also working on a B20 spec so that they can tell retailers what is approved.

 

I asked the same question here and pretty much got the same answer :

http://www.biodieselnow.com/forums/1...ad.aspx#127987