let me just say that you milage may vary.however; I have a 2012 ram with the 5.7 hemi.around 90,000 miles it started the INFAMOUS hemi tick. Then at 100,000 the check engine light came on.I already knew it was the hydraulic lifters which the the 5.7 hemi is infamous for.I was fully prepared to jerk all the lifters but i saw this product and figured it couldnt hurt.one bottle of this and a full synthetic oil change.100 miles later the check engine light is off and my truck is as quiet as the day I bought it.give it a shot! works as advertised!