When it turns yellow and smells odd.
Mayonnaise is a perishable food, and it should not sit out for hours.Yes, mayonnaise can sit out for hours depending on the temperature of the room where the mayo is sitting. For example, in cold areas, mayonnaise is safe for several hours on the counter but in extreme heat, it goes bad quickly.
Yes
Most likely the engine will work with some irritation and vibration.
No. That is quite true when speaking of commercially made mayonnaise and comparing it to fresh onions.
Mayonnaise is basically made from eggs, dairy foods and vinegar. These are not high in purines which can be the cause of excessive uric acid in the blood.
For sure! You can get food poisoning from eating mayonnaise that has been left out of the fridge too long, and it spoils quicker with increased temperature.
It shouldn't. But if you are concerned, pack your lunch in a small cooler with an ice pack.
I thought this would be good but hellmann's mayonnaise is oily and that can still make feet smell bad even more but mixed with miracle whip can still smell bad even even more.
You can, but it would probably taste bad. (Hot mayo?)As long as it's mayonnaise out of a jar, not home-made, you can put a sandwich with mayonnaise in it on a sandwich grill, or in a frying pan, and it's great.Using a microwave, mayonnaise should be mixed, because otherwise its high fat content will cause it to heat before the other ingredients.
If it separated, it isn't mayonnaise anymore. It might have gotten frozen, which would cause the emulsion to break or it got too hot (same result) or it is old. I would not use it.
Onion is what goes bad in the potatoe salad because it attracks bacteria. If you use mayo that is home made then that can go bad but the commercial mayo has preservatives in it. If you put an onion out on the counter when someone is sick and let it there over night you will see how it attracks the bacteria.
no because mayonase goes all funny and watery in the freezer