Should you heat a cast iron skillet before adding oil?

Online Answer
Preheat your skillet before adding any oil, fat, or food. You always want to preheat your skillet before cooking with it on the stovetop. Putting cold food in a cold cast-iron pan will make your food stick. Cast-iron skillets don't heat as evenly as nonstick or stainless steel pans, but they keep their heat very well..
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By not preheating your "stove and pan" before placing your meat in the oven, the meat will steam before it can sear at that ripping hot temperature it should be roasting in. The high heat is the reason for the wonderfully browned tops of roast chickens, pork loins, and roast beef.
Luckily, the preheat time on a convection oven is shorter, meaning you don't have to wait as long! Either way, however, you should always start cooking with a hot oven. This will give you more control over the cooking process..
You can't just throw your food in and then set the temperature — as with most other cooking methods, you need to preheat the air fryer before you use it. ... The same is true of food made in the air fryer. You should preheat your air fryer for ten minutes before you start cooking.
Don't preheat an empty pan or put an empty pan under the broiler. Nonstick coatings made from polytetrafluoroethylene (PTFE) can break down and release noxious fumes if heated above 500 degrees, which can happen quickly when pans are heated empty or placed under the intense, direct heat of the broiler.
Whether using a surface thermometer or not, you still need to heat your pan thoroughly before you add anything to it. Do not add oil, butter, meat or anything until that pan is properly heated. That should take a good 5 to 8 minutes.