I also gave this stuff a shot. I ran some through my car Thurs. afternoon and again yesterday afternoon. My car it produced lots of smoke, I guess since it has nearly 183,000 miles on it. Well it cured my bogging and hesitation problems while cruising, also my throttle responce is loads better. Another thing it cured was the bogging I was experiencing when the car would shift from first to second after taking off from a dead stop. The tick I am eperiencing is not gone but it is resonably quiet now, and my idle is a lot smoother. All in all I think this stuff is worth the 6 bucks.
Last thing I still have a some left so I was going to try it in the oil to see what it would do. I am going to add it to it and give it a couple of days then change my oil.