Hi all, just filled the thirsty f;;;ing Navara D40 ST 489kms for70.2 litres of deisel. Can anyone tell me how to get better economy, my wife and kids tell me I drive like a grandad (which I am). Carrying a fair amount of tools around 24/7 but this thing is just so not right after 3 years with an STR D22 gettting 10litres/100kms