Castrol made a 20W-50 "for use in classic cars"
with ZDDP, but they have discontinued it. Now
they have a 5W-50 that they recommend instead.
Here's the statement from their FAQ:
What is happening to Castrol SYNTEC 20W-50?
Castrol SYNTEC 20W-50 classic car formulation is being replaced by Castrol
with SYNTEC Power Technology 5W-50 viscosity grade. The 5W-50 grade
will also be specially formulated for classic car use and will adopt the
20W-50
claims designed for use in classic cars. The 5W-50 formulation will contain
more zinc additives than the 20W-50 and will also enhance start up ability in
cold temperatures as well as enable better fuel economy*
Compared to SAE 20W-50.
Here's the link:
http://www.castrol.com/liveassets/bp_internet/castrol/castrol_usa/STAGING/loc
al_assets/downloads/f/Castrol_EDGE_FAQ.pdf
-Steve Trovato
strovato at optonline.net
At 06:46 PM 6/26/2011, Bob Spidell wrote:
> Castrol may still have some ZDDP in the
> 20W-50 oil, but the oil companies have been
> kinda coy about revealing what's really in their stuff.
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