I owned my own gas station when even-odd rationing was going on in the 70s, I put gas into whatever I wanted to, no matter what day it was.................
I gotta laugh a couple years ago when I was talking about extended oil changes and keeping the cost of changing oil down with a by pass oil filter. All I heard was oil is so cheap, and I can change it often without the advantage of safely extending oil changes with a by pass filter. It ain't cheap anymore.........
I'm saving even more money than I was before. Toilet paper is still very reasonable, much more reasonable than motor oil is.