am i safe running the new ulsd diesel in my "old" 04.5 cummins?  am i shortening its life span by not running a diesel fuel additive to provide the lost lubrication?  

Out here, you don't have much of a choice. All the diesel sold in CA is now ULSD. You might want to use a lubrication enhancer, but I'm not very familiar with them.  

yeah all the deisel out here in california is ulsd which is why i was woundering if i should be running a diesel fuel additive or not, any suggestions?  

I know Gold Eagle makes some products for diesels. It's the same company that does the Sta-Bil fuel stabilizers for gas cars. Don't have much experience with their diesel products.

RBP also has some additives, but I don't know if they make them themselves, or if they're private-label.

I also found this company called FPPF that seems to have a lot of industrial-type lubrication products. Again, don't know much about them.  

I wouldnt worry about it too much I run red in my 6.7

After all the BS that a new gen truck wont run on red blah blah blah I decided why not try it whats the worst it can *** Not run???? So the third tank i put in the truck was completly red fuel with all the emissions stuff on. Guess what? The truck ran great in fact better than when i put in the usld fuel. Now all that emissions crap is off and buried somewhere in my shop and the truck runs way better.  

wow really all the emsissons gone and red fuel, sound interesting, does this truck have more balls than your old one??  

Sorta when its turned up other than that its is pretty weak. It tows a trailer well so thats what i need it for. The 2 12vs I have are the fast trucks.  

I have an 04.5 cummins and usually fill up with ULSD. I religiously add Power Service additive whenever I fill up and have seen no adverse affects after 73,000 miles.  

did u use the additive before ulsd came out?