If you use power service, white or silver, that's what's it supposed to do, add lubricity.
2 stroke oil is a common trick with older engines, but unless you have deleted the emissions systems,I would strongly suggest you NOT use 2 stroke oil . Reality is many people who know more than us have formulated the various diesel additives to do what the package says, and using anything else you are just trying to reinvent the wheel on a hunch without education or knowledge.
2 stroke oil might work, it might not harm the emissions systems...but I strongly would suggest IF IT DID, it would be sold saying it would do that....
According to the manufacturers...no additional additives are needed, but most people seem to be happy using them as extra insurance and peace of mind ....
Often the extra things a multi purpose additive will do can have a positive outcome...some have anti gel, or ctane improvers
I always used power service (white) and would occasionally pass a gelled up car during the polar vortex events...likewise I kept a bottle of power service red/911, aka meltdown to dump in if gelling started and I wanted to keep running.