Without our knowledge or consent, I know the guys in the US had a load of problems with it and injectors, but am unsure what percentage biofuel is in their petrol?

Battery cutoff: Bit of pain to open the hood evertime the car needs to be started!!! - but good idea for winter or longer term storage...

Is Bio fuel cheaper?? How comes fuel price is still rising if there mixing it with renuable fuel ??

well, over here in Germany we already have 5% and the goverment was on about the new one with 10% only effecting older cars and therefore only a small percentage of cars over here. However, figure from the manufacturers were seriously drastic ..something like Mercs before 2006 wouldn´t run..porsche before 2005 wouldn´t run VW´s built before 2005 wouldn´t run and it got more and more ( official manufactureres figures) to the point that over 3 million cars wouldn´t run on it would be forced to use V power or the equivelent...so the idea was scrapped..they are sticking to 5% and have told the manufacturers they must come up with a soloution on their new cars. Will be interesting to see if they force it through in the UK.

Bio is a little cheaper to produce per unit measure (compared to gasoline). BUT it puts out a lot less energy per unit compared to gasoline. So it actually ends up costing the user more...