I have found LSD B20 to quiet the engine down quite a bit but power is down noticeably, and fuel mileage is down a good 50 miles per tank. If I am thinking with my right foot and my wallet, this stuff is not worth it at all. If I am thinking with my brain, I am still not sure a lubed up engine and saving the world is worth what will add up to a lot of extra money out of my pocket.