Hi there,
I saw today a 10W40 Yaccco oil on which "with magnesium" is written with big letters.
This oil is sold 34,50€/5L whereaas the other oils (Elf, Total, Shell, castrol) of the same weight are between 20 and 25€/5L.
I did a little research on the forum and it apears that magnesium is a...