I'm under the impression that most rubbers used in any parts are dressed in some sort of powder to prevent deterioration/dry-rot. Perhaps this can explain why NOS parts are holding up just fine. I have a tire tube from 1950 that is still like brand new to this day-and does have powder coated on it- If it didnt have this I doubt it would have even survived 20-30 years...The powder absorbs moisture? I'm not sure what else it defends againts. Dani B. #5003 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/