This brand:
S&W Whole Egg Mayo
Information for you:
It is mostly likely similar to the mayonnaise used in Subway's Tuna Sub.
I found out through a forum online searching "Subway Mayonnaise" or "Subway Tuna Mayonnaise" and found out that someone posted that in their store they used S&W Whole Egg Mayo in their tuna, but that the Subway brand was better than that even, and that the Subway mayo is "Less Tangy", that Australian's use less tangy mayo also.
Subway was founded in Bridgeport, Connecticut, U.S. in1965
The mayonnaise that Subway uses is probably sold in or around the Connecticut, Maine, or Canadian areas.
Subway Restaurant on Wikipedia:
http://en.wikipedia.org/wiki/Subway_(restaurant)
I have researched and researched and finally I've gotten somewhere. The mayo that Subway uses is very close to S&W Whole Egg Mayo.
I don't know where it's sold, but I'm on the chase.
If you or anyone else knows the mayonnaise used in Subway subs, POST IT HERE!!!
If you or anyone else that has worked for Subway and made their Tuna, please post the name of the mayonnaise, and/or any details.
If you submit ANY misleading information, it will be DELETED.
Remember that it is free to post on this forum. Create user name, no email bullshit required. Just create one and post, and confirm the letters after you post, and its posted.