Can not find Delo 400 LE anymore, the new one has a lower zinc content. Anyone using a zinc additive? With 142,000 original, my 29 year old baby has only had Delo 400 LE and uses little to no oil between changes, (not lying). Yup, a little intense in the take care of category! thanks for your imput ahead guys! Still looking for pulse adaptor to time mine as well!