The wear present in bores, rings, and valve guides that cause loss of compression is measurable in 100th or even 10th of millimetres not 100th of micrometers which is the level XADO say it works at. Assuming it works I do not see how adding 0.00001 mm to a surface worn by 0.1 mm will help much.
Oxycodone is a strong opioid narcotic pain reliever (analgesic), and Vicodin is a combination of two drugs, hydrocodone (a strong narcotic pain reliever) and acetaminophen (Tylenol). Oxycodone and hydrocodone are similar to other drugs that are opioid narcotics, for example, methadone, fentanyl, and morphine. Both oxycodone and Vicodin are prescribed to treat moderate to severe pain. However, hydrocodone also may prescribed to treat fever, inflammation, and cough.
DRUG CLASS AND MECHANISM: Oxycodone is a strong narcotic pain-reliever and cough suppressant similar to morphine, codeine, and hydrocodone. The precise mechanism of action is not known but may involve stimulation of opioid receptors in the brain. Oxycodone does not eliminate the sensation of pain but decreases discomfort by increasing the tolerance to pain. In addition to tolerance to pain, oxycodone also causes sedation and depression of respiration.