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I am on my THIRD round of Kreen. This one is on fresh oil. The last oil had 5000 kms put on it mixed. It had two rounds of Kreen. Came out so black that, um never mind, it was black. I have a write up coming up this weekend. I have visible reduction in the aluminum foil thick layer of black poop...

Originally Posted By: zyxelenator 400km is not a lot,what I meant. Will see how it will look like close to 1000km or 1600km how kreen recommends. $400 price is high. I think a gallon used over time with short OCIs will improve things.engine might not look spotless,but will feel better for sure...

Originally Posted By: zyxelenator ^ It takes time. 1mm on top of the engine doesn't mean there is no 10mm on the bottom of the engine. I would change oil and filter at 1000km. Then next fill hold it longer and change filter every 1500km. I would use dino(preferably diesel oil) oil and cheap...

I have very little sludge visible thru the filler hole. Its just that all the parts are coated black. I did put my finger inside and scraped some off with the back of my nails and it was like a 1mm thick coating there, maybe even less, of black greasy stuff. But in 400 kms I still saw it there...

How long does it take to show effect? I pulled the stick today and the oil was golden brownish, not indicating any color change which I expected it to show after about 400 kms. I was expecting it to be dark brown by now at least. Is it all gone already without doing its job or should I wait?? I...

Just received my pack of KREEN today. Poured in about 600 ml in my engine. And the remaining in the gas tank which had about 5-6 gallons in there. I ordered 1 Gal + 1 Qt. used te qt for now. I still have about 2000 kms left in the OCI.

Hi all, Thanks to all who posted. I really appreciate your responses and concern. I estimated 1/2 qt for a 3000 km oil change. Not actually measured it yet. The reason I want to do kreen treatment is because the inside of the engine (peeping from the filler hole) is all black coated. I have a...

Hi, I am new here. I love this forum for all the knowledge. It has also cleared up some doubts about oil consuption that I had. I am convinced from all the reqading that KREEN is not going to harm much but mostly benefit an engine that eating up oil. I have a Nissan Murano 2007 that eats a...