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Hey Wayne,
There are lots of good oil brands out there. I use Spectro.
I've used it since 99'. The anti-wear agents in fully synthetic and semi synthetic oil that I look for are zinc and phosphorous (spelling aint right...oh well).
If anti- wear agents are too high (over 1000parts per million) the oil won't pass API standards. Anti-wear agents shorten the life of catalitc converters. The government doesn't like this, but I do.
Interestingly, newer BMWs have cats. Spectro makes BMW oil. At least they used to. Anyway, I run Golden Spectro 20w50 and change every 3000.
C-ya,
Tom.
C'MOOOOOOOOOOOOOON SPRING!!!!!!!!!!!!!!!!!!!!
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