Bio-fuel mixes are being across the world and there is no reason a Japanese or German car running in Brazil will not run in India, Union Minister Hardeep Puri told NDTV in an exclusive interview today. India has signed the Global Biofuels Alliance on the sidelines of the weekend's G20 Summit. "The 20 per cent figure (as told by automakers) is a mindset problem. Auto makers said if you keep the bio-fuel percentage below 20, car parts won't have to be changed... But this is self-serving advice," he added. Automakers, he said, have been warning people that largescale bio-fuel usage will reduce engine efficiency.