If for nothing else get it as a prophylactic.
Man, wouldn't it sting when you put it on?
Okay, maybe my car wash price is high (like everything else the damn place sells). One thing, though, all USA gas is not created equal. A friend of mine who works for a big auditing firm did a cheap-gas company (which I won't name, but it's not one of the big boys). Turns out they don't clean their tanks, that's a costly maneuver that most of the big name brands perform. That's why this cut-rate gas company can charge less at the pump. After he audited that company he swore off of their gas forever.