Experts on this forum don't think it's a good idea. :D:cool:, so suggest you run it on normal petrol but get it from some good reputed one. Different people have different thoughts. Some say mix it 50:50, some say 30:70, some are completely against it. Even some one was saying HOBC will chock cat converter bit early, don't know the logic. My suggestion is follow the manual you got with car, at least this is what I am doing. Cheers.