The caravan should now be ready for winter. I bought 4 Firestone Touring P205/70R15 S95 tires (with mount, balance, and alignment), and installed a new 18" rear wiper.
I filled the gas tank with 91 octane (no ethanol) again.
137.3 miles / 7.919 gallons = 17.3 mpg (Note: It has been a lot colder since my last fill-up.)
Caravan odometer = 178,160 miles