> > If it meets API specifications, it meets API specifications.
> >
> > So much of this stuff is marketing.....
> >
> except that different product doesn't have the same additive package.
>>> If it meets API specifications, it meets API specifications.
>>>
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> But that's not an "except". If it meets API specifications, it meets
> API specifications.
both the motorcraft and castrol oils i used were api oils - there was no
way of telling based on the "information" [not] available which would be
the better oil. indeed, according to the spark analysis crowd over at
"bob is the oil guy", the m/c was a "good quality" oil. experience
showed a very different story.
> The engine manufacturer specifies what oil to use. If they specify
> Mobil 1, then use it. If they specify an oil that meets a certain API
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> into your head and inserting fear, uncertainty, and doubt--in order to
> get you to spend more money for their product.
reality is, sometimes it's worth paying for branding. how much it's
worth paying is another question, but motorcraft vs castrol, with only a
few cents difference per quart? pay the extra and get the better
castrol additive package!
otoh, would i pay almost double for castrol "high mileage" brand? no.
msds info, limited though it may be, reveals no difference between them,
so i don't think it's worth the premium.