Review on Synthetic motor oil VALVOLINE SynPower FE 0W-30, 1 l, 1 kg, 1 piece by Stanislaw Lambach ᠌

Departed for the winter. In the first month, there was a noticeably low consumption of gasoline, but I also had to add oil to the crankcase. Then the oil became black and opaque, the oil level stopped dropping, fuel consumption returned to its previous values. Bottom line: miraculous properties appear only while the oil is very fresh. Then it becomes the same as the cheapest synthetics.