Agree with fifty5 on the reasoning behind the overzealous push for B10 by the government. However, putting that aside, I think with the various negative feedbacks from the german marques and automotive pressure groups, the correct way for the government to pursue this is to allow the sale of Euro5 at all pumps vis-a-vis the introduction of B10. This does not disrupt the "intent" (whether rightly or wrongly) behind the introduction of the B10 as the Euro5 can be priced higher than the B10 to skew the attractiveness towards the latter. In any case more than 90% of diesel consumption are from transportation companies, factories, plants, etc which will use the relatively cheaper B10. The more expensive Euro5 are catered for users who are running higher compression engines in their vehicle and who don't mind paying more for the fuel, akin to how Shell was allowed to introduce their V-Power fuel.