For what it is worth, about a year ago I phoned tech support at Chevron regarding using current gas engine motor oils in older flat tappet engines. I was assured by the advisor that the replacement "package" blended into the newer oils was a suitable safe replacement for the zinc that was taken out. I could tell that he was fielding many phone calls similar to mine, and he made it clear, at least in his mind, that he was kind of tired of car collectors doubting what he was expressing to be true. Bob J From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of C Bilter Sent: Sunday, November 14, 2010 10:57 AM To: retromobilia@xxxxxxxxxxx Cc: Chrysler300@xxxxxxxxxxxxxxx Subject: RE: [Chrysler300] Chrysler 300 oil My question is will the remaining available oil with ZDDP likely go the way of leaded gas; i.e. is it a dying breed and will we inevitably face the need to just use an additive like Eastwood's? My understanding is that the ZDDP levels in motor oil were reduced starting in the mid-1990's. This means that many of us who didn't know any better ran on low-ZDDP for a long time before the issue got a lot of visibility. Do we have an engineer expert in the club that knows for sure that Eastwood's (or other brands) ZDDP leaves undesirable deposits? With the no-lead gas issue, I believe that it has been proven that in light engine use (i.e. not drag racing or towing) that value seat recession is minimal. Twenty-five plus years of no lead gas seems to bear that out. It seems that ZDDP is a more critical issue, especially for the solid-lifter cams and especially during break-in on rebuilt engines. The ZDDP issue has been debated in the club for the last eight years. Is there a clear long-term solution? Thanks Carl Bilter 300J that needs ZDDP _____ From: Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> [mailto:Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> ] On Behalf Of retromobilia@xxxxxxxxxxx <mailto:retromobilia%40comcast.net> Sent: Sunday, November 14, 2010 11:20 AM To: Tom Chvapil Cc: Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> Subject: Re: [Chrysler300] Chrysler 300 oil Tom, I understand that this type of additive does not bond with the oil and can leave deposits in some unwanted and wasted places like the filter and oil pan, rocker arms, pushrods, and so on. A processed and formulated oil with ZDDP zinc and other agents such as Kendall GR-1 High Performance (in various weights) costs just 3.65 per quart. Does this make more sense to you? J D Jung Retromobilia.net ----- Original Message ----- From: "Tom Chvapil" <tchvapil@xxxxxxxxxxxxx <mailto:tchvapil%40earthlink.net> <mailto:tchvapil%40earthlink.net> > To: Chrysler300@xxxxxxxxxxxxxxx <mailto:Chrysler300%40yahoogroups.com> <mailto:Chrysler300%40yahoogroups.com> Sent: Sunday, November 14, 2010 7:49:51 AM Subject: [Chrysler300] Chrysler 300 oil Actually, right now Eastwood has 4oz ZDDP listed on e bay for $6.95, with free shipping. I use it a lot and this is probably the best price I have seen anywhere. Tom Chvapil Tucson,Az tchvapil@xxxxxxxxxxxxx <mailto:tchvapil%40earthlink.net> <mailto:tchvapil%40earthlink.net> [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] [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/