* Eight readers take our challenge * Save hundreds of pounds a year * Read our top 10 fuel-saving tips...
Understandably, the main motivation will be the promise of hefty fuel savings, but there's more than just your wallet to think about.
The more fuel you burn, the more carbon dioxide and other toxic chemicals you pump into the atmosphere. If our eight readers match their improvements on the road for just one year, they'll save nearly a tonne of carbon dioxide each.
If every driver in the UK manages the same percentage savings, that jumps to a whopping 33 million tonnes saved per year the equivalent of taking nearly a quarter of all cars off the road in the same period.