Here is a response to my letter in regards to Rotella T as a substitute
for low ZDDP oil.
Dave
59 :{)
59 MGA 1500
05 MCS
Burlington WI
-------- Original Message --------
Subject: RE: Rotella Ask Our Expert: Switching Oils
Date: Mon, 20 Aug 2007 09:27:55 -0500
From: <AskShell@Shell.com>
To: <dwoerpel@wi.net>
David, Rotella T with Triple Protection 15W-40 CJ-4 has approximately 1200 ppm
zinc (ZDDP). This is 50% more zinc than current passenger car motor oils which
contain approximately 800 ppm zinc. Passenger car motor oils had approximately
1200 ppm zinc prior to 2001. In 2001 the zinc in passenger car motor oils was
reduced to 1000 ppm and in 2005 reduced again to the current 800 ppm. Rotella T
with Triple Protection 15W-40 does have a gasoline rating of SM (not energy
conserving GF-4, would void a new car warranty).
http://www.shellusserver.com/products/pdf/RotellaT(CJ-4).pdf
http://www.api.org/certifications/engineoil/categories/upload/EngineOilGuide2006.pdf
Thus, the new Rotella T with Triple Protection 15W-40 CJ-4 has the same zinc
anti-wear content that passenger car motor oils had in 2000 before the current
problems with flat tappet engine began. Rotella T oils should work well in your
older British cars.
Richard Moore
Staff Engineer
Shell Global Solutions (US) Inc.
Westhollow Technology Center, PO Box 4327, Houston, TX 77210, United States of
America
1-800-231-6950
-----Original Message-----
From: dwoerpel@wi.net [mailto:dwoerpel@wi.net]
Sent: Friday, August 17, 2007 11:40 PM
To: askshell, SLUBE-GSMR/5
Subject: Rotella Ask Our Expert: Switching Oils
------------------------------------------------
ROTELLA.com E-mail Form
------------------------------------------------
NAME David Woerpel
E-MAIL ADDRESS dwoerpel@wi.net
SUBJECT Switching Oils
COMMENTS
----------------------------------------------
Now that ZDDP has been decreased in gasoline engine oils, what oils are
applicable on my 1959 British cars? I have been told Rotella T for diesel
engines would work. Is this true? Any drawbacks?
Thanks,
Dave
----------------------------------------------
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