I Honestly Don't Know how to answer this..could be 1 of 3 cars.
Started Driving around '96.
for the First Couple years it was equal time in either:
1)1993 Chevy Corsica.[4cyl,auto, crank windows, am/fm stereo(not even a tape deck), White], it was mom's car, but i got to borrow it a lot.
2)1994 Ford Aerostar, [3.0 Vulcan v-6, auto w/OD, had a tape deck,"Cayman Green"= Teal], it was dad's Personal car, but he had a company car for work.(the aerostar was one of his old company cars, they replaced them @ 60k mi, and gave the guys the option of buying. that was i think his 4th of 6 aerostars over the years) drove it a lot of the time.
when i got out of high school, and started working/ going to college, the aerostar became my primary(it was what was available), then round sept'98, mom bought a new '99 Taurus, and i got the Corsica.(First car in my name)
then a month later grandpa Died, I got his '87 Olds 98 [3.8 v6, auto w/OD, cassette, Power windows, locks, antenna, and 6 way adjustable power seats. "driftwood Metallic"=champainey-gold, Vinyl top,& Air Level Ride] and the corsica went to my older sister, who wanted "a car" instead of the pickup she was driving.
I drove the Olds From oct.98-Aug.01
so even though the van was the first car that i was the primary driver, and the Corsica was the first car actually titled to me, (but only for a month), the olds "feels" like my first car....
as for oil.. @ that time BP Procare still existed, and we used them for all our maintenance, so likely some Castrol variant in a 10w30, and when they closed, i took the olds to the new "Valvoline Instant Oil Change" place in front of where i worked.
still w/ conv. 10w30.