I PURCHASED MY 2006 ALTIMA 2.5 SL USED NOTICED THAT IT WAS LOOSING OIL EXTREMELY FAST YET WAS NOT LEAKING FROM ANYWHERE OR LEAVING OIL MARKS AFTER BEING PARKED IMMEDIATELY AFTER A COMPLETE OIL CHANGE AND NEW FILTER IT WOULD BE BLACK AND BURNED BY THE TIME I GOT HOME AND RECENTLY WHILE DRIVING FROM FL TO SOUTH CAROLINA MY ENGINE CAUGHT ON FIRE ON THE INTERSTATE WHILE IN MOTION