Read this little snippet at a NASCAR fan site (Jayski.com from The Sporting News): Word in the garage: Some teams are using oxygenated oil additives that can boost an engine's horsepower by five to 15. Winston Cup Series director John Darby says the “snake oil” has been reported for a while, and his officials have taken random samples at Daytona and Talladega to try to determine what is out there. NASCAR always has taken a stringent stand against using additives in gasoline and might take a similar approach with oil. One owner whose team used oil additives last year says there is an increased risk of engine failure. Additives put a strain on the engine's rings because the oxygen reduces the oil's ability to lubricate. Any of you lubrication experts and tribologists care to comment on the performance enhancements of these additives? Easy to make? Easy to hide from an inspector?