Fuel gauge inaccurate - when filled it shows about 306 mile range, i.e. about 15.2 mpg for the 20 gal tank. after driving for 20-30 miles it shows 360 mile range which is more accurate - whether stationery or moving. the fuel economy indicator shows 18.8 mpg in this example. on the freeway the indicator may show 21.0 mpg but the same problem is there.