Not an endorsement of this specific additive for lubricity (I have not used it myself) but the results of the testing provided show a very noticeably improvement (scar rating):I've been very happy with how Stanadyne can, over the course of a few tanks in a row with additive in it, make a very noticeable difference in performance of diesels that have rarely, if ever, received additives.
Opti-Lube takes the cake for best lubricity, if that's your most major concern (which when owning a commonrail, it should). But I can find Stanadyne locally...
I just picked up a bottle of HS EDT but have not tried it yet. Do you use a standard funnel to put it in the tank? I was thinking of just using the nozzle adapter funnel.I use Hot Shots Secret EDT and Diesel Extreme and recently started using LX4 and I also use their winter Additive
I use these products in all 3 of my Diesels