Parking Car For Winter

Hey everyone..My first post..What a great informative site..I park my Duster in a heated garage every winter for about 5 to 6 months.I've been starting it once a month over the winter months,warming it right up,but not moving it.I was told lately by an old Mopar mechanic friend of mine that this is not a good idea because of condensation build up in the engine.He mentioned if I did want to start it that I should put a load on the engine and drive it at least 5 miles,to get all the condensation out of the system.I don't want to take it out in winter because of the cold and snow...Just would like to get some opinions on this subject..I've had this car since I was a kid, bought it in 1974...Thanks everyone..