not Mobil but M-B they were different makers model likely Cruiser II

https://www.imcdb.org/vehicle_1965293-Mobil-Street-Sweeper.html

Advance origin USA
https://www.imcdb.org/vehicle_977914.html

American LaFrance 900
https://www.imcdb.org/vehicle.php?id=1971802


correction
https://www.imcdb.org/vehicle_118099-Ferguson-TEF-20-1951.html
https://www.imcdb.org/vehicle_1869901-Kenworth.html

wrong episode
https://www.imcdb.org/vehicle_663053-Mercedes-Benz-NG.html


correction
https://www.imcdb.org/vehicle_57659-Castelli-CP5-FV.html
https://www.imcdb.org/vehicle_1819641-Nissan-Diesel.html

https://www.imcdb.org/vehicle_1968067-JCB.html


https://www.imcdb.org/vehicle_1796612.html