Well, that was a long time ago....I think I bought whatever was on sale, usually Pennzoil or Castrol, and might even have used Fram filters back then! Don't remember what kind of filters that some had trouble with blowing the gasket out, but used to make sure the filter was on really tight!
One of the cars I bought new, the other when it had 115,000 miles on it. The used one had the filter on so tight I went back and asked the guy I bought it from how he put it on, seems he machined an aluminum socket wrench at work to make sure he had it tight enough!
When I put the mechanical pressure gauge on it I had visions of black oil spraying all over me and the interior when it went past 100. Warm I think the pressure would drop to 60 or so? Usually changed oil around 3000 miles.
I used to keep some kerosene on hand for winter weather and would add a gallon or two when the temperature got below 15 or so. I think winterized diesel fuel already has it mixed in, but I was warned about some places didn't sell winterized fuel, the K would lower the mileage and doesn't have the lubrication qualities of #2 but it never failed to start, even below zero.