Actually, Lion, I do keep two spares already mounted, except when I went looking for a spare rim, the best deal at the time was an alloy rim, not a steel one. So, I need to keep track of extra nuts and the key to take them off and on. They balanced that one when they put it on the rim. I used it once at the time I had to buy the two new ones.
I think the tire repair shop can fix them okay, but if the sidewall is damaged, he can’t make that go away. I remember some years ago seeing nails in an intersection, and started picking them up. I think I picked up over half a pound of nails in a small area. Later they paved it so they are much easier to see.
Also, that 1/2 gallon per half hour is closer than any idea I had. Thanks. I may hit Google, I have been incredibly busy what with a plan to go back in three weeks.
I think I will run a load test in gear and in neutral, on my live data scanner, not sure if it means anything.