It seems like there is always somebody coming out with some 'miracle' oil additive that is supposed to improve fuel mileage, reduce wear, etc. Just recently I heard of another new one that will be coming out-Kiwami. It was tested in Japan. Maybe it is the answer, maybe not. A lot of the oil additives and engine treatments that have come out over the past several years have been fined for false advertising. Some of these engine treatments and oil supplements used technology that had been rejected by the motor oil industry. Some stuff that was tried in oil additives does eventually get into motor oil-like Moly. They had to find the right chemical makeup to make it work in an engine. I can remember my Dad using STP, even in the wintertime. We had to heat it on the stove for a while so that it would pour, after it had been stored in the cold garage. The old STP basically just increased the weight of the oil, and it had anti-wear additive. You can do the same by using a heavier oil. Hey, if you have an oil burner, use 15W40 or 20W50 in the summertime. But I do like Auto-RX and I am going to give Neutra a try also. Auto-RX cleans an engine up in a safe manner so that the oil can actually do its job. I have a problem with any oil company that sells oil supplements and yet claims that its motor oils are tops. As far as I know, Quaker State still sells Slcik 50, a product that I never used. But I have to admit that I tried some other oil supplements, like Tufoil and Lubegard. I think a person is better off using the best conventional or synthetic oil they can find (and this web site helps with that), the best oil filters and air filters they can find for a reasonable price, and use a product like Auto-RX or Neutra to keep the engine clean. As an engine ages and becomes more worn, you can increase oil weight somewhat. Use a 10W30 in the summertime, instead of 5W30. Or use Mobil 1 5W40 instead of 5W30. There have been some tests of some oil supplements and engine treatments by people at this web site. One supplement was tested and basically was found to be just a rip-off, containing very small amount of additives in a thick mineral oil. Something like that is not going to help you. Use a good motor oil that meets SL and SAE requirements.