WHILE DRIVING ON INTERSTATE CAR JUST QUIT RUNNING. HAD TO PULL TO SHOULDER AND USE EMERGENCY BRAKE TO STOP. CAR TOWED, FIRST REPAIR SHOP SAID IT WAS AN ELECTRICAL FIRE. THEN TOWED TO KIA DEALER WHO WOULDN'T REALLY COMMIT ON CAUSE. BLAMED SLUDGE ON MOTOR. HAVE SERVICE RECORDS. REGULAR MAINTENANCE AND OIL CHANGES.