Thanks for the link, looks like a good deal. My only question is, is it worth it on a vehicle with 100k miles on it?? Sure it will help, but what about towards life of vehicle. It's my daily driver and trying to keep it going as long as possible and I drive 60+ miles a day on it. With gas as high as it is now, would like to increase my mileage. Like I said, it's got 100k on it so I don't want to dump loads of money on it. Have had 0 problems with it to date and would like to keep it that way. Just better to leave it alone or what??