i put the exact same stuff in last week i filled it up with petrol halfway then put half the bottle in then fill it right up and put the rest in, you cant put it in though then not drive the car because it settles in the tank and ive heard of people having problems starting the car again. you need to take the car out for a good thrashing and let it go though but i found the car ran a little bit better and throttle response was better to, dont know about the emissions side of it but its worth doing anyway lol