Example- I restored a 65 Corvette years
ago, and had a Holley double pumper carb. I had a T fitting that split
the fuel supply to go to both bowls. This fitting happened to be plastic,
and worked fine for as long as I owned the car. Eventually, I sold it,
and build an AC Cobra replica, also with a Holley double pumper, and the same T
fitting. I drove this for a year or so, then one day smelled fuel, and
opened the hood to see fuel spraying out of that fitting. The station I
always bought gas from had a big sign out front advertising some new wizbang
additive, which apparently attacked the plastic. Rest assured that I
immediately made a frantic call to the guy who bought
my Corvette.