The reduction of ZDDP was to reduce hydrocarbons in the emissions
David Nock
British Car Specialists
Stockton Ca
www.britishcarspecialists.com
On May 24, 2011, at 1:41 PM, Michael Oritt wrote:
> I was under the impression that the reduction in ZDDP was required in order
> to comply with the SM-API oil standards. If this is so how can companies
> "add back" ZDDP?
>
> Best--Michael Oritt
> ----------------------------------------------------
>
> On Tue, May 24, 2011 at 9:49 AM, Schneider Mark
> <mandmschneider@comcast.net>wrote:
>
>> EditorGary,
>>
>> Regarding the topic of the initial running of rebuilt engines the point
was
>> made that some over-the-counter oil companies have begun to add ZDDP back
>> to
>> their 10-40 and 20-50 weight oils. Which companies are they? If I can
>> purchase oil with an adequate amount of ZDDP already in it I can stop
>> adding
>> it on my own.
>>
>> Marks 3
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