I ended up doing a lot of searching and asking questions a couple years ago and got some good info from this forum. This Peak site will give you some info on what's available. One thing if you don't know the brand don't try to go by the color to determine what the product is and even if you do know the brand some products are offered in different colors. I ended up using the fleet charge in my older diesel engines that were due a coolant change. I had been using the coolant additive from JD but they quit selling it. Another thing just because a antifreeze is labeled Heavy Duty doesn't mean it's a diesel engine SCA Antifreeze.

  http://www.peakhd.com/ .