I don't sit and watch infomercials and I don't like to promote any additives and such. I was just curious what everyone else uses for oil and gas additives if any, and any results you've seen. I am quite convinced that most of the **** out there does not do anything. But I have to admit I found something that really made me open my eyes. I put some "Marvel Mystery Oil Fuel Cleaner" in my fuel tank, and WOW! My car runs so much smoother and quiter after adding this stuff. I've done it twice now about every 10,000 miles and I can notice the difference when I add it.