I've used the GM EOS which used to come in a tin can (~1 pint iirc) & now is in a plastic bottle along with "regular" oil but agreed that it would be the best to use a tailor made zinc equipped oil such as one of the ones mentioned. I used to use Rotella diesel oil & it was changed (different labelling on the white plastic bottle and they lowered the zinc) but it still has some in it. I hear www.bobistheoilguy.com is a good read on the subject.