[Healeys] Fwd: Castrol USA - Contact Us Form Data

[Bob Spidell]

Just when I thought this made sense ...

I re-read it and this can be parsed as "the CURRENT formulation has 
boosted zinc levels" but the "NEW formula" has "Recommended for Classic 
Cars" on the label (I'm sure our cams and tappets will be glad to hear 
that ;)

I think "Current" and "new formula" must be the same, but???

Kudos to Castrol for trying (I think).

bs


Warthodson at aol.com wrote:
>
> The new formula Syntec 20W-50 for classic cars is API SM.  The statement
> "Recommended for Classic Cars" should be visible in the  middle of the back
> label.
>
> The Zinc levels in the API SM / ILSAC GF-4  viscosity grades are defined by a 
> table of requirements but in basic terms  20W-50 is not held to the same
> requirements as the lower viscosity grades  (5W-20, 0W-30, 5W-30, 10W-30); 
> 20W-50 can be higher.
>
> Current Syntec  20W-50 (for classic cars) is actually a modern premium
> quality API SM  product that has been Zinc boosted to Zinc levels that are
> reminiscent of  Zinc levels from historic API categories such as SG when flat
> tappet cams  with high spring loads were common in the fleet. The API SM
> category has  the most rigorous passenger car engine oil (PCO) test
> performance  requirements in the history of the API PCO categories.
>
> Castrol Consumer  Relations
>
>   
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Bob Spidell         San Jose, CA        bspidell at comcast.net
'67 Austin-Healey 3000             '56 Austin-Healey 100M
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