I have some Quaker State "Q" Full Synthetic. 2006 is the trademark date on the label, though I don't think it's quite that old. Clear bottles, still looks good, but the older I get the harder time I have seeing at the molecular level. Still have two cars it would be at home in this winter. 10W-30 FWIW. Have other oil I can use that is newer. Just hate to waste. That said, I have lawn equipment that would love to have this oil in their bellies.