Car dropped 250 RPM and is now stuttering

WSUTARD said
So it took 10 gallons out and I'm driving it around now to get it lower then fill it up. Wouldn't I see vapor out the tailpipes if it had enough water to mess up the engine?

Not necessarily. Weather conditions play a factor as well.

Hopefully it is just a bad batch of gas.

Throw some Chevron, Shell, 76, Sunoco or Mobil in there and let's see what happens.