Credit crunch starting to bite? Are the running costs on your car too high? What Car? has compiled a list of the most fuel-efficient cars on sale today, and you can find out more, here. However, if you aren't about to change your car but still want to cut your fuel bills, then read our special guide to how you can drive more economically. Click here for our top ten tips. Those savings could be greater than you think, too, as fuel producers are about to cut production. Find out why here.