Sorry, I took another look at the Penzoil grease today at WalMart, says lithium complex right on the lable. I don't know where that "food grade" comment came from! Just trying to get a response I suppose. Any comments on the "Lubriplate" brand of Aluminum Complex grease? They are not rated Marine grade but should be rather waterproof, with good antiwear thickeners. Would they be useful in marine environments?