humps
A2OC Donor
even 51 is very very good. I've done 45 best, 65mph on motorway (with 3 adults + luggage, climate control on). Calculation is: miles x 4.55 / petrol in liters. Basically, if you see about 270 miles on a single fill up on the small tank petrol (mine is usually 30L), you're 40mpg+.