Quote Originally Posted by Mirek
It was with a car from Belgian championship, I don't know exact regulations for the fuel - if they use their own or how it is. In the national championship I think the risk of running out of fuel isn't that big as the loops aren't that long but anyway he told me the consumption was some 20% higher.
In the Belgian Championship it isn't allowed any more, in the Netherlands it is used a lot in Nissan 350Z's and Evo R4/N4's.