i was doing some reading and trying to find out what was the top choices for diesel add. i use PS right now and was hearing stuff about some other ones. which is better.

I use Stanadyne. I've used Amsoil before ,but Stanadyne is a little cheaper, and some would say is a little better.

I've been using Opti lube for the past year. Was using the XDR formula but now I'm using their summer blend. It's more expensive but last 3x as long because you use less per fill up.

Ive been using cen-pe-co. its good stuff. they have a few types.