At 08:04 AM 2/21/2001, mgraziano@mindspring.com wrote:
>according to this, the worst of the synthetics is the 5W50. Exactly the
>one I put in my car three weeks ago.
>
>Castrol Syntec 5W50. Any thoughts?
>
>Mike
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I was taught that the greater the spread in VI numbers, the more additives
and likely the lesser quality, given a choice. I was told that the lower
number is at best the starting grade, the rest is accomplished with
additives. The advent of synthetics might break that rule, however. Also be
aware that the reason for low VI numbers being recommended comes from CAFE
ratings rather than optimal lubrication.
Peter C (former Castrol distributor)
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