Long drive for nothing

Did You see the '303' Tractor Fluid class action lawsuit??
Not a clue which Tractor Fluid we were using. It was from NAPA stores in 1994 when I was going to collage for my AS's in Automotive and Welding. Can you remember what oil you used 29+ years ago for cutting and grinding if it was not your equipment? I know it was clear. colorless and did not stink too bad. Tasted real bad on my salad.