I use Powerservice in my 06 Cummins and also run the 2 stroke oil about every other tank. I agree, not sure how much it all helps and especially the 2 stroke oil but it sure hasn't done any harm.
"Suppose you were an idiot And suppose you were a member of Congress... But I repeat myself." -Mark Twain
"My reading of history convinces me that most bad government results from too much government." -Thomas Jefferson