Kroil Kreen Gas & Oil Treatment - Engine Cleaner Additive - Improves Compression, Reduces Oil Use & Removes Carbon Deposits - for Gas & Diesel - Can - 1 qt - 1 Pack (KR161)

I have used many engine flushes and have noticed they all “work” in some way but not the same way. This picture is from a 2009 caravan with 174,000 miles on it. As you can see the oil may be a little dark but the engine is clean. I added the whole container to the engine(did this just when I needed an oil change) ran the engine for 10 minutes then drained the oil(BTW this stuff smells really bad).After I filled it up and changed the filter I drained and filled the engine with new oil 2x after the initial flush to get any remaining Kreen out of the engine. The oil stayed cleaner longer afterwards and the engine ran better. If you are going to do this use cheap oil for the drain/fill then finish off with a quality oil. I also threw a 1/2 container of this in the oil and 1/2 in the gas of a car with fresh oil without draining it and it has been over 1,200 miles now. The car is over 15 years old and drives like a rocket. I did notice when I opened the oil cap that there was some deposit removal in blotches and the deposits that were still there were not soft. I believe it’s supposed to be run 200/300 miles then drained. I think this stuff flashes off after a few hundred miles, when I smelled the oil cap at 1200miles there was no Kreen odor.

Great product. I have been using for years. Works better than most other cleaners

I have used this product for years, it cleans the fuel system while the car runs. Improves milage an the life of the vehicle. Keeps the engin running smooth. It used to be harder to purchase. Amazon makes it easier to obtain.

Best stuff out there for oil and gas. I use once in a while in my truck’s gas and oil.

Only 4 stars because you spill part of it every time you try to pour it out of the PoS can!

Put a dab on a rag and use it to clean off a throttle plate, it cuts through the carbon much faster and easier than brake clean or carb cleaner. I add this to gas tanks, engine oil and use it for inductions. It's not harsh smelling like evaporative chemicals, It's comparable to kerosene in form.

item was just as described

One treatment significantly reduced oil consumption due to gummed up piston rings on my 2016 Volvo S60.