Good video I'm not a scientist and every brand has someone pushing it,but it is fact it's the blood,I respect the info but let's just go back to 1990 when Castrol GTX was the chosen oil and light a Winston and comb our moustache just kidding but thanks for opening my eyes beyond ppm of zinc being the only factor I won't lie that's all I look for,use to run Kendall but lost local distributor thanks for all the info..