First off I totally agree with all of you ,I can't even remember the last time I was stranded with a flat tire.Always seem to get somewhere to re inflate it and then get it repaired.
Interesting comment about flat tires with 50% wear ,never really thought of that,did have a flat tire on a brand new Lewis General tire 5 miles from where I had just purchased it.Put the spare on ,went back to the dealer,dealer would not replace it,called it a run flat.What do you expect when you are driving 75 to 80 on the expressway and a tire blows out.Never ever used a Lewis General tire again.
Longest trip I have taken with this car was 352 miles,was not comfortable without a spare and oh yea by the way when you buy one of these cars used like I did ,it is the norm to find that someone has already taken the inflation system out of the car.
Considering going to Va to see my son on the 4th if he can't come to my house,that is why I posed this question.I have the green goo and now a inflation pump.What I did once many years ago was to use an old spark plug ,hollow our the ceramic and tap a 1/4 npt thread in it ,screw it in #1 cylinder ,red neck compressor.