I ran Seafoam on my 96 Integra GSR with 165,000 miles, and it ran so so so so so so so much better, the idle was completly smooth after, and while driving it felt like it gained at least 10-15 HP. It may have been such dramatic results because the car had 165K, but WOW! P.S. Change your oil and spark plugs after, maybe even your O2 sensors because mine stopped working after the seafoam. You will not regret it.