| Sounds like it's "regular" SYNTEC which, since it's also used with 
modern cars, would have to have reduced ZDDP in order to preserve cat 
converters.
Smells like marketing.
bs
Editorgary@aol.com wrote:
> This reference from the Castrol Website, passed on through our MG Vintage
> Racing Group suggests that they've got the word that we need added zinc
> protection in a good 20-50 synthetic. All I know is what I read here. YMMV.
> Cheers
> Gary
>
> Exceptional Engine Protection for Classic Cars
>
> <snip>
>   
-- 
***************************************************************
Bob Spidell         San Jose, CA        bspidell@comcast.net
'67 Austin-Healey 3000             '56 Austin-Healey 100M
***************************************************************
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