Okay so I don't like the price and I'm a fan of chemistry and tribology. I prefer to use cheaper products with more added value like Schaeffer #131. However, nothing else worked in this case! I knew Frank when he was alive and first used his product in I think 2005 or 2006. I bought a 2005 Chevy Impala 3.4V6 for one of my 3 college sons about a year ago when he was a senior at HS was! They were easily neglected. For most of the year I progressively filled the engine with Schaeffer's 131 oil with each oil change, starting at 1 oz/qt initially and going up to 3 oz/qt with no success with either oil. change by increasing the dose. I also switched to synthetic oil. I was starting to think the rocker arm was defective. Just before he went to college I added 3/4 of a bottle of Auto-Rx and within seconds the heave tick was reduced by 50% before disappearing after about a minute. 2 months later he came home and the lift tick was still gone even with a cold start. I've never seen much of an impact in the past because all my cars are meticulously maintained! Now that I have kids with used cars whose history we just don't know, I have to say the Auto-Rx was great! I currently have 2 bottles in my garage! Too bad Frank isn't with us yet! Fast forward all those years and I love his invention! There is nothing comparable on the market!
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