How is my test invalid ? When my car was warmer it did 140psi and when it was colder it did 170? I'll do another test with it warmer and will you then be pleased? But is it not possible that that the chemicals react with the hot spots or something I'm not saying it rebuilt or repaired anything because it's scientifically impossible without any chemical hardeners or solid deposits but if something was sticking or wasn't sealed properly that this worked ? Therefor FIXED my issue..... Maybe it did maybe it didn't but my driving experience is much better and the power is completely different so if you don't have the time or money to do a rebuild or replace the engine why not?