Hi Guys, I (nearly) finished the petrol with brake fluid inside and filled fresh petrol with no additives. The performance is still amazing !!! It seems there was some blockage witch was "blown" by the brake fluid. Despite the mixed vacuum hoses I am happy like pig in the mud !!! I will give another update after I finish at least other tank of petrol. Thanks a lot to all of you for your advises. They really helped me !