I WAS DRIVING IN THE FREEWAY WHEN I HEARD AN EXTREMELY LOUD BOOM AND MY CAR STALLED. I RESTARTED MY CAR AND IT WAS DRIVEN HOME. CAR DEALER MECHANIC STATED IT WAS AN EXHAUST BACKFIRE AND BLAMED IT ON USING CHEAP ARCO GAS. I HAVE HAD ONE MORE STALL ON THE FREEWAY AROUND LAST APRIL.