thats still pretty rough (60miiles to a tenner), redex is ok, too watery nowadays though, it used to be like treacle, if you can get some direct into the engine and some in the petrol you may notice some difference, if you put it direct into the engine expect loads of smoke! and you will need to rev it as you tip it in or it will die but it will really do its job if you can get it straight in, it used to go in the carbs but i dont know about injectors, it should say on the bottle if you got a big one.