Changes to new car emissions legislation scheduled for 2009; the 'Euro 5' standards, will make particulate filters as commonplace in diesel car exhausts as catalytic converters are on petrol cars.

The goal is an 80% reduction in diesel particulate (soot) emissions, but the technology's not without problems; roadside assistance patrols are already being called to cars with the particulate filter warning light illuminated, which normally indicates a partial blockage of the DPF filter.

Car leasing is fast becoming a more popular option as compared to purchasing a brand new car outright. One of the primary reasons is that car leasing companies typically purchase direct from the vehicle manufacturers, thus passing on the benefits to their clients. Take a look at some of the benefits of car leasing as opposed to outright purchase of a brand new vehicle: