FYI - if a little zinc is good, a lot is NOT better. Things get too slippery
and the tappets donâ??t rotate on the cam lobes. I learned this the hard way
and the machine shop informed me of the error of too much zinc.
So either Valvoline, Brad Penn or Kendall that have ZDDP, or half a bottle of
Red Line break-in oil per instructions, is the way to go.
Rye
Sent from my iPhone
On Sep 9, 2018, at 7:24 AM, Randall <tr3driver@ca.rr.com> wrote:
>> Five or 10 years ago I didn't think there was much of an
>> zinc ingredient in Valvoline racing oil. Have things Change D?
>
> There was a brief period where they reduced it slightly; but Valvoline
> Racing has always had ZDDP in it. It's not entirely clear to me that 900
> PPM is worse than 1100 PPM as long as you change oil frequently; more just
> lets you run the oil longer before it is depleted. But the consumer
> reaction was apparently enough to convince them to put it back up.
>
> -- Randall
>
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