So the technical article basically said that diesel fuel already has decent lubricity. welp I guess facts don't care about our feelings.
I also like how the article says in the most polite manner that many additives are potentially snake oil. -A large number of aftermarket additive products are available to meet these real or perceived needs. Some are aggressively marketed with testimonials and bold performance
claims that seem “too good to be true.” As with any purchase, it is wise to remember the
advice, caveat emptor, “let the buyer beware"

Even Chevron admits that nobody is really testing the effectiveness of all the additives out there.

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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.