I make mayo on a regular basis and with a single egg I've been able to make 2 liters of mayo (and roughly same volume of mustard which also acts as a binder).

I make mayo on a regular basis and with a single egg I've been able to make 2 liters of mayo (and roughly same volume of mustard which also acts as a binder). Industrial mayonnaise is not made with a simple whisk and elbow grease but with high speed methods that allows for much more water and oil to be part of the mayo. When I make mayo water is not even an ingredient whereas Hellmans has it as the second ingredient. The only water I get is from lemon juice or vinegar. So yeah something smells fishy with their claims.