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Hi all, Not being a member of the API nor an automotive engineer, the reporting by me of any internet or other source article, not actually verifiable, about motor oil, peanut butter or any other product should be taken as unverifiable data and used by the reader as part of their decision process about that product. With that obvious statement made, I draw your attention to the feedback email from Valvoline oil in 2008 on this ZDDP discussion. Note not the latest SN rating. Also note that the sentence in red starts out using the word "consensus" and later uses "sufficient. You decide. Short of hiring one of the six labs used by the API (club project?) to run independent test for us I am not sure what to conclude? Van. The oil industry per ILSAC had to only decrease the levels of ZDDP (Zinc) in certain viscosity to meet new emission standards. The ILSAC rated oils still have an average of .085 levels of zinc. Testing has shown on standard OEM set ups that used mild camshafts or flat tappet cams, will still get plenty of protection from the new rated oils. There is an exception when it comes to extreme aftermarket applications. If you have a high performance solid lifter set up with an aggressive cam then you will need to use a quality Racing Oil or Fleet Oil for break in and normal usage. These oils have an increased level of Zinc that will range from .14 to .16 and will provide plenty of protection.
The consensus in the industry is that the current chemical limits of the GF-4/SM category are still sufficient to protect all "street" engines, including older flat tappet engines. The engine tests required for a GF-4/SM product is just as severe as the older, higher ZDDP allowed category. For the special applications (aggressive cams, high HP racing motors, etc) where the customer needs more ZDDP protection, our NON-GF-4 products still contain the higher levels (such as VR-1 and "not street legal" racing). feedback@xxxxxxxxxxx To: VWEBMAIL@Ashland __._,_.___ 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#querylang __,_._,___ |
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