fluid type for A-518

thats a myth about type f damagining seals, it even says it is in a mopar magazine, the august of 2000 edeition, i have a stack of mopar magazines thats taller then i am, and i was reading thru some of them and they accually encourage people to run type f in the 727 and it says dont worry about type f doing harm to any seals thats an old wise tale.