New gas, old gas, good gas, bad gas????

[AVL Jeeper]

Just wondering something, I keep seeing you guys say that our stock fuel pumps don't hold up to the "new" gas. What is it about this "new" gas that is bad for our trucks? Is there something we can treat the gas with to keep it from "eating" the fuel pump diaphram? I was using a lead sub. but was told in a previous post that it was unnecessary because the 230 already has hardened valve seats. Could it be that the lead sub. is what has made my fuel pump last? I want to prolong the life of all the components on this truck as long a possible(its cheaper that way ).

Thanks for the input.
Karl