Must have been around 1973, rented a Chevy Impala for 4 weeks with Budget at JFK, drove it to Montreal to visit friends and did a Canada/USA tour: Ottawa, Sudbury, Thunder Bay, Duluth, Mineapolis, Chicago, Detroit, Toronto, Montreal and back to JFK. No idea about the milage. Had a problem with a tire, geometry was not OK, Budget Montreal replaced the tire, but did not fix the problem. Mileage? No idea. Still have good memories of that trip.