Probably one of the best products out there. Make sure you follow every instruction for better result

Good to use after changing different types of oil.

Dose a good job cleaning excessive slosh etc., could be a bit better.

will make your engine refreshed

I have been using this product for the past 12 years at least once a year. In my opinion, it is effective in cleaning the gunk out of the engine. When used in tandem with high quality fully synthetic engine oil, the engine will be well protected. Highly recommended. E. K. Akdogan

If your diesel emissions requires low SAPS oil, then this engine flush is a great way to catch at oil change the sludge and grime that low-detergent oil can't catch in normal driving. Also works well in all engines in general and keeps that fresh oil clean.

Great product at a great price. Liqui Moly makes great products that really work.

I needed something to flush out the gunk and grime from my engine due to being a little bit late with my oil change, which I never usually do, but things do happen ocasionally, which delayed my oil change from being on time. The Liqui Moly Proline Engine Flush came to the rescue, and worked really well. It was pretty strait-forward, and easy to use, and cleaned out quite a bit of grime out of my engine. Good product, easy to use, does the trick if you find yourself late with your oil change.

I’m not 100% sure how to tell if this works or if it’s just snake oil. But I used it in my 2009 Benz. Fast shipping !!!!!

I could see in my oil filler that it appeared pretty squeaky clean in there after running the flush. Gives me peace of mind using German products on my TDI.