Always 10W-30
Always Supertech oil or anything on sale that was close in price.
Always used either an AC Delco or STP filter.
Always changed the oil every 3k, which was about once every six weeks.
My cost back then was $5. Just under $10 in today's money.
My daily driver then, a red 1994 Toyota Camry Coupe with the four-cylinder, is still on the road today.