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I get about 42 miles to a UK gallon - mixed driving with 50% motorway driving at speeds I should not document.
20 city and 30 highways.
The 2009 Volvo C70 has 20 valves.
The 2009 Volvo S80 has 24 valves.
The 2009 Volvo S60 has 20 valves.
The 2009 Volvo XC70 has 24 valves.
The 2009 Volvo C30 has 20 valves.
The 2009 Volvo XC90 has 24 valves.
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