Tax

[Piggy]

Adding it to the cost of fuel means you pay more tax the more fuel you use, so even an efficient car will get hammered if it's used for long journeys every day (like my 100+ mile commute) while someone with a hulking great V8 that's only used on sunny summer Sundays is going to pay far less...I can see the benefit to both means of calculation.

Yeah but thats a perfect system.

You would be polluting more than the V8 driver!! And if he is on LPG he would be cleaner than your crappy eco machine per mile anyway!! Esp when that cat on the econaturefriendly does a heat cycle and chucks all the rubbish out the exhaust.

There will never be a system ruled by man where every man is happy.