Dino oil (cheaper and works just as good up to 4-5K miles)
3-4K mile changes w/ filter.

Last time I tore into an engine, it was one my 16v VW which I ran the same oil and intervals driving the snot out of it, and it looked like new inside at 180K miles. Only tore into it for more displacement.

Long interval oil changes scare me. Especially after seeing some stuff like this...

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'95 4wd Pickup