The best I've gotten was 29mpg on a road trip in overdrive. It was just after I had it serviced and I also drive a 1982, but I drive a wagon. So, if you happen to have a sedan you may/should be able to get more.
Pat
I get about 42 miles to a UK gallon - mixed driving with 50% motorway driving at speeds I should not document.
The 2004 Volvo XC90 2.5L 5-speed automatic gets 16mpg city and 22mpg highway with a combined mpg of 19.
20 miles to the gallon 20 miles to the gallon
15 miles to the gallon 15 miles to the gallon
18.5 miles a gallon
it can get 8 miles to the gallon
There are many on the road with over 300,000 miles on them
16.5 miles per gallon
52.27 miles per gallon
About 21.4 miles per gallon. (300/14 = 21.4)
Between 13 miles per gallon and 16 miles per gallon.
9-13 miles per gallon