Refrigerator?
Opened store-bought mayonnaise generally keeps its best quality for approximately two months in the refrigerator, although some brands may provide different guidance.
Always check:
The package instructions
The best-by date
The condition of the product
How cleanly it has been handled
Homemade mayonnaise has a much shorter lifespan and is often best used within only a few days. (Southern Living)
The Best Place to Store Mayonnaise in the Refrigerator
Store mayonnaise on an interior refrigerator shelf when possible.
The refrigerator door experiences more temperature fluctuations because it is
