RE #6
Depedns on the recipe. Mayo uses egg yolks too.
RE #9
Big Chief - Hellmans and Best Foods mayo are the same product, the name is just different depending on what side of the Rockies you are on. Take a look on the side of the jar.
Anyway...
I agree w/ big chief that Kraft mayo is only OK.
Heinz makes a really good mayo product, but I don't recall ever seeing it in anything but single serve packets. I suppose it probably exists in food service size vat sized packaging too.
Trader Joes also sells a "Real Mayo" product that lacks all the thickening agents and preservatives of commerical mayo and only has like five or six ingredients (it is pasturized for safety though). It's pretty good, but it has too short a lifespan once opened, I used to buy it, but I was always throwing out jars that were 2/3 to 3/4 full when the flavor would turn, which allways occured long before the expiration date.
For mass produced commerically available mayo - Best Foods / Hellmans regular works fine for me. I've tried the olive oil mayos, the canola oil mayos, the lite mayos, from both Best Foods and Kraft, and none of them have the flavor I'm looking for. Best Foods / Hellmans regular has that flavor.
But the best of them all is Alton Brown's mayo recipe:
(tip: if you make it yourself, use the absolute freshest eggs you can find)
http://www.foodnetwork.com/recipes/alton-brown/mayonnaise-recipe/index.html
and his other mayo recipie:
http://www.foodnetwork.com/recipes/alton-brown/party-mayonnaise-recipe/index.html