I must say, I was very interested in this service when I came across it and I was not disappointed! 30 minute process and once it was done, I took it for a spin to see how my car felt. The way it felt was as if the “congestion” in my car was cleared. More responsive and I noticed a little extra mileage as well. I’m going on 164k in miles. I’m a bit of a maintenance junkie, so something like this was a must for me and I couldn’t be happier. Richard is an awesome, knowledgeable person on his product/services. Highly recommend!