'Gas' in the UK is at (£1.20) $2.40 litre, diesel (£1.30) $2.60 litre (14/06/08)
Been looking to do this but not sure it will suit the higher compressions of a typical in line 4 engine found in most UK cars.
I already get 42mpg out of my car and not sure if its worth it for a 5% increase in fuel economy.
Trecker, good work, keep it up