Bought readymade, the best-before-date will be on the container.
Made at home, the best-before-date of the mayo will be on the jar.
If the dip has been kept refrigerated, then those dates will apply.
Otherwise, I would be wary of any dip which was more than a few hours out of a fridge.
They don't make cheese with mayonnaise
Yes, you can cook with mayonnaise. It can be used as a marinade, a topping for baked dishes, or as a binding agent in recipes like casseroles or dips.
Homemade mayonnaise typically lasts for about 1 week in the refrigerator before it spoils.
It depends on the ingredients, but dips made primarily with sour cream could last two weeks or more.
Homemade mayonnaise typically lasts for about 1 to 2 weeks in the fridge before it spoils.
Mayonnaise is an example of a thick, creamy condiment commonly used in sandwiches, salads, and dips. It is made from a mixture of oil, egg yolk, and vinegar or lemon juice.
Homemade mayonnaise typically lasts for about 1 to 2 weeks when stored in the refrigerator.
Mayonnaise Spoilage Myths - Mayonnaise Safety http://homecooking.about.com/od/howtocookwithcondiments/a/mayospoilage.htm
Sure it can. It depends on what you are making though. Mayo is higher in calories but is very creamy
You can safely refrigerate mayonnaise for up to two months after opening.
Homemade mayonnaise typically lasts for about 1 to 2 weeks in the refrigerator before it spoils.
It can, but not for long.