<VV> Fully broken in and ready for synthetic oil

[Stephen Upham]

Correct me if I'm wrong, but I thought that synthetics were the  
ultimate oil to use.  I don't remember reading any discussions about  
the levels of ZDDP in synthetic oils.  They always seemed to center  
around dyno oils.  Do I understand correctly that synthetics also need  
to have high ZDDP levels to be effective in our Corvair engines?

Stephen


On Mar 17, 2011, at 9:22 AM, Bryan Blackwell wrote:

> Hi Stephen,
>
> Not to be too difficult, but what makes you think there's enough  
> ZDDP in it?
>
> Perhaps I'm paranoid, but a minimum of 1000 PPM seems reasonable to  
> me - that was the SL standard.  I'm not aware of any consumer off  
> the shelf 10W30 oil with that much, thus the discussion of other  
> weights recently.
>
> My short answer is I'd use something with a published ZDDP spec of  
> 1000 to 1500 PPM.
>
> --Bryan
>
> On Mar 16, 2011, at 11:23 PM, Stephen Upham wrote:
>
>> I'm getting ready to change the oil for the second time since the
>> rebuild.  During the break-in period, I've been using Brad Penn oil -
>> the green oil.  I'm now going to switch to a fully synthetic oil,
>> Castrol Syntec 10w-30 (a full synthetic) and use a Mobil-1 filter.  I
>> believe that this will alleviate any concerns over having sufficient
>> ZDDP for our flat tappets.  I just wanted to run it by the crew for a
>> final check before changing the oil.
>