Save your money, all we ever add to diesel is Dextron III. Fill your spin on filter with it, and then dump the rest in the tank
P.S. I don't mean to run your car on PURE atf!!!
I mean find a diesel station next to a Wendy's and enjoy some fries while your diesel fills up

__________________
Greg Maxwell, President
Munchen Motors Inc.
Bosch Service Center, Est. 1987