Xado claims that their 20w50 oil has an additive that helps restore engine from the inside bu coating the scratches something like ceratec from LM but is that true ? Has anyone tried that or have any experience with xado as a company? I am tempted to use that as the oil comes blended with the additive so I don't have to spend extra or mess up my oil to additive ratio, btw it was SL rated full mineral oil now it is semi-synth rated SN " picture just for reference ""