I WAS DRIVING MY CAR DOWN THE ROAD HEADING TO GET SOMETHING TO EAT. IT WAS A SUNDAY NIGHT, IT JUST STARTED MISTING RAIN. I DROVE ON MY USUAL CURVY 2 LANE PAVED HIGHWAY AND THEN PROCEED ONTO MY USUAL 4 LANE PAVED HIGHWAY TO MCDONALD'S WHERE I GOT FOOD INSIDE AND THEN UPON LEAVING DECIDED TO GO THROUGH DRIVE THROUGH FOR ANOTHER ITEM. I LEFT AND HEADED APPROXIMATELY 3 MILES BACK ON THE SAME ROAD I TRAVELED TO TOWN ON. AS I WAS ON THE 2 LANE ITHE ALL OF A SUDDEN APPEARED TO BE RAINING HEAVIER AND I COULD TELL BY THE RAIN CROSSING OVER MY HEADLIGHTS. SOMETHING DIFFERENT THAN NORMAL CAUGHT MY EYE, IT LOOKED LIKE ORANGE RAIN, I ASSUMED JUST THE APPEARANCE FROM ONE OF THE BULBS. UNSURE THOUGH, I CONTINUED DRIVING BUT SCOOTED TO THE EDGE OF MY SEAT AND SET UP TALL TO GETTA BETTER LOOK, AT THAT TIME I SEEN FLAMES. THE CAR WAS ON FIRE, I COULDN'T PULL OFF SIDE OF ROAD AS IT HAS NO DITCHES JUST RAVINES SO I SLOWED DOWN AND TRIED UNLOCKING MY DOOR TO OPEN IT WOULDN'T AND MY WINDOW WOULDN'T ROLL DOWN, TERRIFIED I PROCEEDED TO CALL 911 AND INFORM THEM MY CAR WAS ON FIRE AND I WAS IN IT DRIVING DOWN THE ROAD AND WAS HOPING TO GET TO NEXT ROAD I KNEW I COULD PULL OFF. THE ENTIRE TIME NEVER DID ANYTHING WARNING LIGHTS OR GAUGES COME ON NOR DID THE TEMPERATURE RISE. I FINALLY WAS ABLE TO EXIST THE CAR FULLY ENGULFED IN FLAMES. THE POLICE DEPARTMENT AND FIRE DEPARTMENT FINALLY ARRIVED. THEYOU GOT IT PUT OUT BUT IT WAS COMPLETE LOSS. I HAVE NO IDEA AS TO WHY THIS FIRE HAPPENED I TOOK