In 2022 I bought a used Ford Cmax 1800 125ps Duratec with 140,000 km and the car was burning more than half a liter of oil per 1,000 km. In fact, I was constantly topping up the oil and changing it often, hoping to clean the engine a bit and at least reduce the problem a little. I don't have 2,000 euros for an engine repair as the mechanic suggested; yes, the car is good overall, but it is now 20 years old, and besides, you never know what tomorrow will bring with their insistence on fighting internal combustion engines as time goes by, especially when you own a car today with a large engine and emissions..
I tried the product 2,000 km ago when the odometer was at 159,000 km, hoping it would clean the engine internally and maybe save me at least a little from topping up the oil. I deliberately checked it yesterday after 2,500 km since filling it with the liquid and changing the oil and filter; today my odometer reads 161,400. And oh, what a miracle, it seems not to have burned a drop of oil, and if it has and I can't see it on the dipstick, it is definitely minimal, certainly nothing visible to the eye and definitely I don't need to top up the oil at this moment. After 2,500 km, whereas I was adding 500 ml every 1,000 km!
Is the problem solved? Does it no longer need piston rings and valve seals as my mechanic and Ford's own dealership in Heraklion, Crete claim? Only God knows. What I saw is that the car did not burn oil after 2,500 km, and that is enough for me for now. In the future we will see. For the time being, I am completely satisfied!