I think you will find that the Valvtect dealer gets his
diesel from the same refinery that supplies other diesel
fuel docks in your area. In other words, it is all the same. The only benefit of Valvetect brand being on the pumps is to influence you to buy their additives.
Do their additives
work? Maybe yes and maybe no. The only additive worth
purchasing IMO is a biocide additive to keep bacteria from growing in your diesel (well with a little
water thrown in).
David