<VV> 0W oils?

[CARLETON BRIGGS]

Keep in mind that older engines like Corvair require PDDF, zinc content for
durability. Zinc was removed from all oils with the introduction of
catalytic converters.  Most zinc inclusive oils are racing oil available at
O'Reilly or any farm supply store. I go to Rural King to save on cost.

On Sun, Jan 28, 2024, 1:10 PM Bryan Blackwell via VirtualVairs <
virtualvairs at corvair.org> wrote:

> Hi Grant,
>
> Kind of an old post, but I thought I'd reply anyway.  I get the idea, but
> I personally wouldn't run a 0W in a Corvair.  The current engine designs
> run tigher clearances and in many cases considerably more pressure to work
> with the 0W oils.  There's also the issue that a Corvair beats on the oil
> pretty hard due to the temp swings, and the way oils generally work is they
> start with a thin base and use additives to get the hot number, those
> additives wear out and the oil ends up being thinner over time, I'd have
> some concerns about using a 0W-30 or 0W-40.  I don't see any real benefit
> to going that low, perhaps a 5W would work ok, but even there it would have
> to be a fairly fresh engine.  Bear in mind also that the current synthetics
> flow much better anyway, a 10W-30 now has a much lower cold pour paint that
> when the Corvair was built.  Certainly if you're going to try it I'd plan
> on doing regular oil analysis.
>
> --Bryan
>
> > On Jan 2, 2024, at 12:43 PM, Grant via VirtualVairs <
> virtualvairs at corvair.org> wrote:
> >
> > Wondering if some have some experience with the newer synthetic 0W oils.
> Everything I have read sounds good such as better flow and lubrication at
> low temps while keeping the protection of the hot numbers (20-30, etc.)?
> > Thanks
> > Grant
>
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