<VV> Another good oil article by a Porsche guy focused for air cooled engines

[Mark Durham]

Hi all, hope those of you there are enjoying Sturbridge!  This url will
take you to a good article focused on oil needs for older engines, and
specifically for older air cooled porsche's. It mentions the use of Boron
as a wear lube, and talks a little bit about the other additive packages
and how they work in the engines.

http://www.lnengineering.com/oil.html
I think we have seen that any one article does not provide all the
information on oils that a informed flat tappet owner may need to make a
good oil decision, its important to extract the good information out of
each. One person sought to discount the wear testing of new oils article I
submitted, casting doubt on the validity of the test basis, saying there is
no way to know how they do once used. If you remember, Quaker State Defy
was the subject of the day. If you go to the QS web page, they plainly
state their oils are oil sampled and tested for three industry tests after
the oil is removed from service at a normal manucfacturer recommended drain
interval, and the oils in question still meet new oil standards at the end
of their service life. While I am sure no oil deteriorates the same as
another due to base stock and additive differences, it would be consistent
to say that the better oils, using better base stock, would provide longer
protection for our engines.  Enjoy this article, too. Mark Durham
On Mon, Jul 16, 2012 at 2:48 PM, Mark Durham <62vair at gmail.com> wrote:

> Gents, I searched to see what reactions other flat tappet forums are
> having about the Defy oil. The Corvette Forum has a article by a classic
> car guy who did shear testing on 48 oils, including the Defy 10w30.
>
> 540 RAT's results, as you will see, may change the way you look at oils,
> but keep in mind his focus is on shear strenght, or the ability to prevent
> contact. It really is a good supplement to Richard Widman's article on
> oil.
>
> The article has changed my belief that synthetic oil is actually better at
> protecting your engine. The Industry standard Amsoils and Mobil 1's did not
> come out on top in these independent tests, either, and they are good
> oils. Many of todays later generation Dino oils for modern engines did very
> well in the shear tests, too. Nor was it consistent that a higher weight
> oil did better over a lighter weight oil.
>
> While the author says there are "no bad oils in the group", the oils at the
> top outperform those at the bottom in shear strenght by a staggering almost
> 100% margin. That is significant. I think that from now on I will be making
> selections at least in the top 10% of the list for all my cars, and add the
> ZDDP to that oil as necessary for the Corvair.  By the way, the Defy 10w30
> is in the top 10%, and at 15.64 for 5 quarts, is a great buy.
>
> Enjoy the article.
>
>
> http://forums.corvetteforum.com/c3-tech-performance/3078239-quaker-state-s-new-defy-motor-oil-lab-test-and-wear-test-data.html
>
> Mark Durham
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