Out of date Diesel Fuel Additive to prevent Diesel Bug

[D&T]

I have some Grotamar 82 which I have noticed is a few years out of date.

Firstly is it ok to use? and if not, what is considered to be the best additive to use, Grotamar or Marine 16 Fuel Complete Treatment?

Thanks for any advice

 

[Refueler]

Age is basically irrelevant as long as the container has been closed ... DoE's are a product of marketing with this sort of item .... designed to convince you to buy again.

I have containers of various additives that are years old. Tests show that they work same as day first acquired. Because my Company has near ceased additive ops ..... market has changed significantly here - I am left with significant stock. Slowly its passed on to other operators. Before they take supply - its tested and passes.