Hello Jamey:
Thanks for the note. Castrol does have a loyal following especially in LBC
and motorcycle circles.
Some of the best recent documentation I've seen of objective testing was in
an issue of Motorcycle Consumer News. I don't remember the exact issue, but
seems like it was in June or July of 1996. If you are interested and can't
find it, drop another note and I will try to locate it for you. They did
some testing of major brands of motor oil over a fairly long timespan. They
looked for viscosity breakdown, foaming, and a few other parameters. The
only lubricant that outscored Castrol 20W/50 was Mobil 1, a synthetic oil.
It is easy for people to form allegiances to particular brands and to
foster prejudices against others, all without a lot of hard data. I know a
fellow who religiously runs Quaker State because that's what his father
used. I am sure you know of other instances. There are lots of excellent
brands of motor oil, but the important thing for equipment longevity seems
to be oil and filter change at frequent intervals. For my hardware, I
change every 3,000 miles or 6 months whichever comes first.
David F. Darby
White River Valley, Missouri
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