boxcartommie22, have you tried their fuel additive (AR6200), yet?
I have, and I must admit that I thought it was a scam, when the instruction told me to add 10 ml first time, to 50 liters of diesel(some 13 US Gallons).
After that, only 5ml is needed!
It turned out, confirmed so far in 3 different vehicles, that it wasn't a scam.
I guess I will try their AR9300, too, though I doubt it can be as good as AR6200.