Re: Re[2]: [ST] Mobil 1 15W-50 SuperSyn Oil

[sobiloff@xxxxxxxxxxxxxx]

>From: "colt4530@xxxxxxxxxxx" <colt4530@xxxxxxxxxxx>
> Subject: Re: Re[2]: [ST] Mobil 1 15W-50 SuperSyn Oil
>
>Generally, the viscosity index (VI) improvers used to reach 40, from 5W are
>not high temperature stable and are easily sheared by gear teeth.

But the VI improvers used in 15W-50 are high temperature stable?  They aren't the same as the ones used in 5W-40?  (Just trying to learn.  Thanks!)
- --
Blake Sobiloff
San Mateo, CA

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