Sorry, I would interpret an ingredient spec as requiring a MINIMUM amount of
an active ingredient. The maximum limitation is entirely driven by the need
to avoid contaminating emissions equipment, not by any characteristic of the
motor oil as a lubricant.
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires
on 9/1/10 8:16 AM, Paul Hunt at paul.hunt1@blueyonder.co.uk wrote:
> Yes, limits for ingredient content, e.g.. how much zinc and phosphorus,
> which is what was being asked about.
>
> ----- Original Message -----
>> The limit is so they don't foul cats (hence the problem); which is a
>> performance spec re emissions.
>>
>>> ----- Original Message -----
>>>> No, these are performance specs, not ingredient specs. And flat tappet
>>>> engine wear is no longer part of the performance spec, apparently.
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