WHILE DRIVING ON TURNPIKE, CONSUMER STATES HE HEARD A NOISE, AND HE LOOKED UP IN HIS MIRROR AND SAW FLAMES COMING FROM THE REAR OF THE MOTORHOME, THE MOTORHOME WAS COMPLETELY DESTROYED, FIRE DEPARTMENT UNABLE TO DETERMINE THE IGNITION SOURCE FOR THE FIRE, POSSIBLY ENGINE RELATED, OCCUPANTS SUFFERED MINOR INJURIES WHILE TRYING TO EXIT VEHICLE.(OHIO TRAFFIC CRASH REPORT#10-91-344)*JB