<VV> Rotella Ask Our Expert: Gasoline Engines

[Mark Durham]

Hi all, have done some more research on oils and higher ZDDP levels. Have
found a mention on another hot rodder site that verify's that in 2006, the
Shell Rotella T oils do have the higher ZDDP in them. However, what has
happened since then is unknown, other than I got the below statement direct
from Shell in Nov 2009. The Oil I used then (which is still in the car) is a
CI-4.

Here are two other links I found. 1takes you to the Mobil 1site, and it
explains the ZZDP levels for their oils. 2, takes you to a well written oil
and flat tappet article that explains a bit of history and which oils to
look for. It appears the older CI-4 oils still have the higher ZDDP, but the
same brand and weight oil as a CJ-4 does not. Beware!

Happy reading.

http://www.mobiloil.com/USA-English/MotorOil/Car_Care/AskMobil/Flat_Tappet_Engines.aspx
http://www.indianachevelles.com/newsletter/July07Newsletter/page2.html

Great to see you and your Vairs today, Craig.

Regards
Mark Durham

On Tue, Nov 3, 2009 at 8:36 PM, Mark Durham <62vair at gmail.com> wrote:

> Gents, I requested information from Shell Oil on their Rotella T 5W-40
> Synthetic oil at the first of this string and what follows that is  Shell's
> reply. Looks good to me. :):)
> Mark Durham
>
> On Tue, Nov 3, 2009 at 7:00 PM, Mark Durham <62vair at gmail.com> wrote:
>
> > Excellant. Thanks  Mark Durham
> >
> >
> > On Tue, Nov 3, 2009 at 4:43 AM, <shelltechnical-us at shell.com> wrote:
> >
> >> Dear Sir,
> >>
> >> Since your vehicle does not have a catalytic converter, Rotella T 5w-40
> >> Synthetic would be an excellent choice.  It has the higher ZDDP levels
> you
> >> need.
> >>
> >> Regards,
> >>
> >> Shell Technical
> >> #
> >>
> >> On Tue, 3 Nov 2009 02:38:17 +0000 you wrote:
> >>
> >> >------------------------------------------------
> >> >ROTELLA.com E-mail Form
> >> >------------------------------------------------
> >> >NAME               Mark Durham
> >> >E-MAIL ADDRESS     62vair at gmail.com
> >> >SUBJECT            Gasoline Engines
> >> >COMMENTS
> >> >----------------------------------------------
> >> >I have a old 1962 corvair air cooled engine that runs hotter
> >> (thermostats open at 250') than all water cooled engines, and has flat
> >> tappets that require higher ZDDP levels, zinc and phosphorus - to
> survive.
> >> Most gasoline oils no
> >> >longer have the required PPM of these essential elements due to
> >> cataylitic >converter issues. I'm wondering if the Shell Rotella T 5w40
> >> Synthetic diesel oil has sufficient additives to protect my cam and
> lifters.
> >> And if there are
> >> >other additives that might create problems for this gasoline engine.
> >> Thanks
> >> >Mark
> >> >----------------------------------------------
> >>
> >>
> >>
> >>
> >
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