Yea that is the big question for all the products that say they contain zddp
including StP.
Some say you really don't need the extra zddp after break in and others
continue to add a
zddp additive. It comes down to your choice depending on what your
resources are leading
you to believe.
Mark
----- Original Message -----
From: <fogbro1@comcast.net>
To: "Healey List" <healeys@autox.team.net>
Sent: Wednesday, May 25, 2011 10:49 AM
Subject: [Healeys] Valvoline VR1
> List,
>
>
>
> Received the following from a guy who's street car is "a fuel cell short
> of a
> race car".
>
>
> Valvoline VR1 used to be racing oil used almost religiously be a lot of
> racers.
> A while back we started to find it on auto parts stores' shelves with and
> at
> the same price as regular oil.B Turns out that Valvoline was just taking
> advantage of the famous name.B This oil is API Service SM intended for
> modern
> cars with catalyctic converters and with a reduced lever of ZDDP.B
> Although
> the bottle says it has ZDDP added.B I'm not sure how it can be SM, a
> service
> standard that calls for less ZDDP, add ZDDP and still be SM.
> Valvoline still makes VR1 racing oil. It now clearly says racing oil on
> the
> bottle and is expensive.B Like Penn Grade 1 racing oil it does not have
> an
> API rating and is officially intended for off road use.
>
> Ed Woods
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