More fuel for the fire...ok that was "crude" humor (hehe).
Below is a response I received from Castrol in response to my inquiry
regarding ZDDP levels.
59 MGA 1500
-------- Original Message --------
Subject: RE: CastrolUSA - Expert Advice Form Data
Date: Mon, 21 Apr 2008 14:22:20 -0400
From: Castrol <Castrol@idea-factor.com>
*Thank you for contacting Castrol,*
The latest API SM/ILSAC GF-4 category calls for reduced Zinc and
Phosphorus levels to allow extended catalyst life in current model
vehicles. There appear to be field issues associated with the SM/GF-4
oil's level of antiwear in the classic car engines known as flat tappet
cam engines. The current late model passenger car engines are not flat
tappet cam engines and have no reported field issues related to the
level of antiwear chemistry in the SM/GF-4 oils.
**_Product Recommendations for Flat Tappet (Solid Lifter) Cam Engines:_**
Castrol Syntec 5W-40 (min Zn = 0.10 wt % = 1000 ppm)(full synthetic)
Castrol Syntec 20W-50 (Recent reformulation identified by "Recommended
for Classic Cars" text on back label) (min Zn = 0.12 = 1200 ppm)(full
Castrol TWS Motorsport 10W-60 (BMW dealerships) (min Zn = 0.10 = 1000
BMW Long Life 5W-30 (BMW dealerships)(min Zn = 0.095 = 950 ppm)(full
**_New Motorcycle Products, Expected to be Available Q2 2008:_**
Castrol 4T 10W-40 and 20W-50 (min Zn = 0.10 wt % = 1000 ppm)
Castrol Actevo X-Tra 10W-30, 10W-40, 20W-40 and 20W-50 (min Zn = 0.10 =
Castrol Actevo X-Tra Offroad 10W-40 and 20W-50 (min Zn = 0.10 = 1000 ppm)
Castrol Power RS GPS 10W-30, 10W-40 and 20W-50 (min Zn = 0.12 = 1200
Castrol Power RS R4 10W-50 and 5W-40 (min Zn = 0.12 = 1200 ppm) PREFERED
Castrol Power RS V-Twin 20W-40 and 20W-50 (min Zn = 0.12 = 1200 ppm)
**_Existing Motorcycle Products, Will Be Transitioning Out:_**
Castrol Grand Prix 4-Stroke Motorcycle Oil 10W-40, 20W-50 (min Zn = 0.10
wt % = 1000 ppm)
Castrol GO! 10W-40, 20W-50 Motorcycle Oil (min Zn = 0.10 = 1000 ppm)
Castrol Consumer Relations
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