[FC] Oil additive??

[Bryan Blackwell]

FWIW, here's what Mobil has to say on the subject:

http://www.mobiloil.com/USA-English/MotorOil/Car_Care/AskMobil/ 
Synthetic_Oil_and_Tappets.aspx

BTW, their 15W-50 still has 1200 ppm of ZDDP, according to their spec  
sheet:

http://www.mobiloil.com/USA-English/MotorOil/Files/ 
Mobil_1_Product_Guide.pdf

I think they are correct that for an already broken in engine, 800  
ppm ZDDP is sufficient (if not, there would be *lots* of problems  
being reported).  For break-in, however, you probably want more like  
twice that.

--Bryan

On Sep 28, 2008, at 12:55 PM, Ben and Lynn Stiles wrote:

> FC friends-
>
> I got this from a classic car acquaintance. Does this have merit?  
> Should I
> be worried about what I am running in my FCs? (Havoline 20W 50)
>
> Thanks for any insight. Could the end of enjoying our classic cars  
> really be
> coming?
>
> Ben
>
>> The ZDDPLUS (Zinc/Phosphate) additive is now in stock.  The EPA is
>> requiring oil manufacturers to eliminate this additive in lubricating
>> oils as it shortens the life of a catalytic converter.  Oils with the
>> API rating SM do not have adequate amounts of Zinc and Phosphorus  
>> needed
>> to prevent the cams & tappets from failure in engines manufactured  
>> prior
>> to the 1990s.
>>
>>
>>
>>
>>
>>
>
>
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