[sparker10]

Yeah I agree with the comment:

"From what I remember, warmer fuel creates smaller droplets in the combustion chamber and that the larger the drops of fuel the more soot is produced, so if I understand correctly, warmer fuel would create less soot and thus would burn cleaner"

However I don't think its going to make too much of a difference.

Watched an interesting program the other night about how to save fuel - didn't realise little things such as removing any weight from the boot, having the air in the tyres full, having the windows shut over a certain speed (due to drag), using the brakes sparingly by cruising at junctions can help greatly. To be fair when you think about it it is obvious.

The program showed a family using a diesel fuel car and they was going on a activity holiday. Anyway they attached the family bikes to the back of the car and had a tent thing on top - to cut a long story short they could have saved a lot of money by renting bikes and buying a tent when they got there due to the extra cost in petrol due to the extra weight and drag on the car.