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Why do you think the synthetic oil might have done that? I ordered some
ZDVP from Moss, So I guess Valvoline racing one might be overkill for me.
Can you have too much zinc?
On Sun, Sep 9, 2018 at 7:46 AM TERRY SMITH <terryrs@comcast.net> wrote:
> Just my experience, but on my last engine rebuild, my lifters were toast,
> having traded much metal with the cam lobes. I'd run exclusively Valvoline
> synthetic, an otherwise fine oil except for the zinc content. Now I'm
> running Valvoline 20-50 racing oil. So far no problems, but we'll know for
> sure at the next tear down.
>
> Terry Smith, '59 TR3A
> New Hampshire
>
> > On September 5, 2018 at 1:59 PM Randall <tr3driver@ca.rr.com> wrote:
> >
> >
> >
> > > I've been told that Valvoline Racing oil has zinc in it.
> > > It's odd that the newer cars don't require it. In fact, why
> > > is it important?
> >
> > Lots of opinions, here are mine:
> >
> > In a nutshell, it helps protect critical surfaces (like cam lobes and
> > lifters) in case the oil film breaks down (gets rubbed away by the
> relative
> > motion of parts).
> >
> > The TR camshaft (along with many other performance cars) is actually
> pretty
> > aggressive in terms of force developed between the camshaft lobe and
> lifter
> > during high rpm engine operation.
> >
> > Newer engines either use roller lifters (to eliminate the rubbing between
> > lobe and lifter) or less aggressive camshafts (that are less likely to
> rub
> > away the oil film).
> >
> > Honestly, I'm not absolutely convinced that the TR motor needs the extra
> > ZDDP. But it seems clear that many older engines do (even those not
> > particularly high performance by today's standards); and it hardly seems
> > worth taking a chance by using a lower ZDDP oil. (AFAIK, all modern
> motor
> > oils still contain some ZDDP, they just have lower amounts. The oil
> > industry has been searching for a suitable substitute, but I haven't
> heard
> > of them finding one yet.)
> >
> > -- Randall
> >
> > ** triumphs@autox.team.net **
> >
> > Donate: http://www.team.net/donate.html
> > Archive: http://www.team.net/pipermail/triumphs
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> >
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>
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Content-Transfer-Encoding: quoted-printable
<div><div dir=3D"auto">=C2=A0Why do you think the synthetic =C2=A0oil =C2=
=A0might have done that? I ordered some ZDVP from Moss, So I guess Valvolin=
e racing one might be overkill for me. Can you have too much zinc?</div></d=
iv><div><br><div class=3D"gmail_quote"><div dir=3D"ltr">On Sun, Sep 9, 2018=
at 7:46 AM TERRY SMITH <<a href=3D"mailto:terryrs@comcast.net";>terryrs@=
comcast.net</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Just my =
experience, but on my last engine rebuild, my lifters were toast, having tr=
aded much metal with the cam lobes.=C2=A0 I'd run exclusively Valvoline=
synthetic, an otherwise fine oil except for the zinc content.=C2=A0 Now I&=
#39;m running Valvoline 20-50 racing oil.=C2=A0 So far no problems, but we&=
#39;ll know for sure at the next tear down.<br>
<br>
Terry Smith, '59 TR3A<br>
New Hampshire<br>
<br>
> On September 5, 2018 at 1:59 PM Randall <<a href=3D"mailto:tr3drive=
r@ca.rr.com" target=3D"_blank">tr3driver@ca.rr.com</a>> wrote:<br>
> <br>
> <br>
> <br>
> > I've been told that Valvoline Racing oil has zinc in it.=C2=
=A0 <br>
> > It's odd that the newer cars don't require it.=C2=A0 In f=
act, why <br>
> > is it important?<br>
> <br>
> Lots of opinions, here are mine:<br>
> <br>
> In a nutshell, it helps protect critical surfaces (like cam lobes and<=
br>
> lifters) in case the oil film breaks down (gets rubbed away by the rel=
ative<br>
> motion of parts).<br>
> <br>
> The TR camshaft (along with many other performance cars) is actually p=
retty<br>
> aggressive in terms of force developed between the camshaft lobe and l=
ifter<br>
> during high rpm engine operation. <br>
> <br>
> Newer engines either use roller lifters (to eliminate the rubbing betw=
een<br>
> lobe and lifter) or less aggressive camshafts (that are less likely to=
rub<br>
> away the oil film).<br>
> <br>
> Honestly, I'm not absolutely convinced that the TR motor needs the=
extra<br>
> ZDDP.=C2=A0 But it seems clear that many older engines do (even those =
not<br>
> particularly high performance by today's standards); and it hardly=
seems<br>
> worth taking a chance by using a lower ZDDP oil.=C2=A0 (AFAIK, all mod=
ern motor<br>
> oils still contain some ZDDP, they just have lower amounts.=C2=A0 The =
oil<br>
> industry has been searching for a suitable substitute, but I haven'=
;t heard<br>
> of them finding one yet.)<br>
> <br>
> -- Randall=C2=A0 <br>
> <br>
> ** <a href=3D"mailto:triumphs@autox.team.net"; target=3D"_blank">triump=
hs@autox.team.net</a> **<br>
> <br>
> Donate: <a href=3D"http://www.team.net/donate.html"; rel=3D"noreferrer"=
target=3D"_blank">http://www.team.net/donate.html</a><br>
> Archive: <a href=3D"http://www.team.net/pipermail/triumphs"; rel=3D"nor=
eferrer" target=3D"_blank">http://www.team.net/pipermail/triumphs</a>=C2=A0=
<a href=3D"http://www.team.net/archive"; rel=3D"noreferrer" target=3D"_blan=
k">http://www.team.net/archive</a><br>
> <br>
> Unsubscribe/Manage: <a href=3D"http://autox.team.net/mailman/options/t=
riumphs/terryrs@comcast.net" rel=3D"noreferrer" target=3D"_blank">http://au=
tox.team.net/mailman/options/triumphs/terryrs@comcast.net</a><br>
</blockquote></div></div>
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Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
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