[Shop-talk] Oil grade selection

[Mike Rambour]

  The Ferrari Dino has always had camshaft issues, most early Ferrari's 
did and that is when ZDDP was in the oil so I am not convinced that it 
is the solution.

 I still add ZDDP in my Dino just to be "sure" and consider it 
insurance, I will also put it in the Spridget motor again as very cheap 
insurance.

    mike

Randall wrote:
>> There has
>> been much talk in classic car circles about this,
>>     
>
> Indeed there has been a LOT of talk, but precious little hard evidence.
> Just once, it would be nice for someone to assemble two identical engines
> and demonstrate the difference of running a low-ZDDP oil in one, and
> high-ZDDP in the other.  The entire ZDDP debate seems to be based mostly on
> increased camshaft failures; but the increase in camshaft failures started
> BEFORE the reduction in ZDDP!
>
> BTW, ZDDP comes into play when there is metal-to-metal contact, ie the oil
> film breaks down.  If full synthetics do have higher film strength, they
> should be better able to maintain the microscopic oil film and hence have
> less need of ZDDP.
>
> Randall
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-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Mike Rambour
Bug Writer err...Programmer
      mikey at b2systems.com
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