(Milwaukie, OR)  --  The Clackamas Fire Department says a house fire destroyed more than a dozen cars at a car dealership next door.  Owners of Volstice Auto on Southeast McLoughin Boulevard say 13 cars were lost while 30 more were damaged yesterday.  Neighbors in the area say it was the third time a fire had to be put out on the property in the last year.  The fire is still under investigation.