Everyday we hear about products that make big promises but are disappointed when we buy and try them. My Charger has 184K miles. It's tired, and recently developed a lifter tick. Annoying to say the least. I read something about Prolube and thought I don't want to spend the big dollars to get one lifter fixed. So yesterday I serviced my noisy powersteering pump and engine with Prolube. As of today I am amazed. Both seem quieter and smoother. I'm still going to hold my breath a few more days but right now I am so very impressed. Prolube you have one me over big time.