Hey, pkmorgan17:
Are you the guy that was at PAW on Tuesday? I think that you can see what I meant when I said that this site would be a great resource!
People here seem to be very partial to the Redline product line. There are other products out there, but the Redline Diesel Fuel Catalyst or 85+ gets the most raves. And yes, I do believe that it is “worth it” to use a fuel additive; and I am a person that is very skeptical about all the snake oil garbage out there for cars in general.
Check out this thread - it is a good ‘going through’ your car list when it is brought to a new home.
http://www.peachparts.com/shopforum/showthread.php?threadid=19269
And about the ALDA adjustment that I mentioned, use the search function to get more info (also check "aneroid"), but here is a thread where I described the results:
http://www.peachparts.com/shopforum/showthread.php?threadid=19762
And let me know if/when you want to sell that SD. I kind of like the idea of a matching set.
Good Luck!
(And if you’re not the guy that was at PAW, then disregard any personalized references.)