I know of quite a few people using the stuff hoping it will help with oil consumption. Most have shown no sign of any change whatsoever. A Taurus with a pushrod 3.0 L developed a pile of leaks after starting the Lucas diet, but I'm inclined to call that coincidence. The 4.0L Jeep seemed to leak from it's inexpensive and easy to replace valve cover gasket more slowly than it did with just oil. The Lucas stuff helped, and you can't pour a valve cover gasket in as easily. The three Nissans with 2.5L engine all started getting lots of sparkly glittery stuff in the oil with no other noticable changes. I think the additive stabilized the chi in the motor and allows it to take magic sparkly material form. Magic sparkles are good, right?