I use Red Line break in additive. It is recommended for older flat tappet motors and replaces the zinc missing in the new oils. I use about a half bottle with a fresh oil change of modern dino oil, not synthetic. I don't feel synthetic makes sense for collector cars because of the high cost, usually frequent changes and potential for leaks. Bob J From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Rich Barber Sent: Tuesday, January 08, 2013 11:31 PM To: chrysler300@xxxxxxxxxxxxxxx Cc: jpeabo@xxxxxxxxxxx Subject: [Chrysler300] Zincified oil for a C-300? John Peabody was trying to get this message on the server. I've seen some high-zinc oil and additives advertised but have not kept the information handy. Anyone having a good answer for John, please send it to him at: jpeabo@xxxxxxxxxxx <mailto:jpeabo%40verizon.net> Rich Barber Has the 300 group come up with a zinc replacement or a zinc additive for our flat tappet brutes? Everything I come up with is a synthetic oil or a blend. I stored my C-300 without changing the oil knowing I'll have till spring to come up with an oil or a zinc add. My friend added synthetic oil in his Chevy 409 and sprouted leaks. My Chrysler is the only car I have, new or old, that doesn't leak and I want to keep it that way. The right choice should work for the 'old man' or the 'hot rodder' type driver. Thanks, John and Nancy Peabody [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/