In the last month I've driven 1500 miles, real mixture of town, country roads and a couple of longer motorway runs, my overall average on the computer is 20.8, on the motorway runs at 70/80 mph average 25 mpg, on long country runs around the same, in town 16/18 mpg, I drive carefully always being mindful of mpg and only accelerate hard and overtake occasionally, i don't really see how anyone driving a 2001 Ls430 can get much better figures than this.