Liqui Moly 20004 Hydraulic Lifter Additive 300 ml

This stuff really works! Used in a Chevy 5.3 that had lifter rattle on start up, and also at times even with the engine warmed up. Note I did an oil change and also used liquid moly engine oil along with the additive. Engine has not made any noise since doing this with well over 1000 miles so far. I’m very pleased with how this is working and will definitely get this additive every oil change from now on.

Stuff works great !! Had a200,000 mile truck bad lifter rattle , noise gone

Quiet’s noisy lifters! Noticeable difference adding to the oil of my 2016 Dodge Durango 3.6l

First of all, I'm not going to give this product a terrible review. This product is NOT meant for mechanically damaged lifters or parts of a valve train and is not a magic "fix your engine additive." It's meant for if you have sludge or some crud causing a lifter to stick.(which at that point you should be changing the oil on a more regular basis). My 02 Suburban with the 5.3 has a bad lifter that's ticking pretty loudly. This product did nothing for it, but again that's because the mechanical roller on the lifter is chewed up, if it was just clogged up with debris, this stuff would probably take care of that, and stop the tick.I only give 4 stars because I didn't have a chance to test it on an engine that had a lifter tick due to clogged/dirty lifters, so I don't really know how it'd work on that. For $10 I'd definitely try it again if I had another lifter ticking, because if could just be debris and gunk!

I got the lifter knock on my 2009 GMC Yukon. Was dreading having a shop do a top end on my motor with 165000 miles on it so I decided to give this a shot. After a couple hundred miles the knock cleared up. This product saved me thousands of dollars. Highly recommend AAA+++

Tried this in a Jeep 4.0L with 180K miles. Lifter noise was only present during winter months, and it would go away after a couple minutes of driving. Thought I'd try this stuff to fix a minor issue...but big mistake. Now the lifter noise is significantly louder and there on every startup - warm or cold. I fear it did more harm than good, and plan to immediately do another oil change to get it out of my engine, and hope there is no permanent damage. Also, the product images say its made in Germany but Country of Origin says Afghanistan? I'd stay away from this stuff.

Tapping noise lessened somewhat but not completely.

Certainly a great product and very highly recommended for BMW of all models.