I forgot about chain lube in that long list of expenses. So "Various chain lubes" - 3 in1 Oil works just fine

And in fact, 3 in 1 was formulated for sewing machines, a use that I have forgotten (maybe locks?) and bicycle chains.

I use Tri-Flo, Finish Line wet (MTB) lube and a fancy synthetic stuff now but I commuted long ago on 3 in 1. Used often enough and kept clean enough, they all work.