Oiling the grill is necessary sometimes and it is beneficial as well. For example, if the grill grates are not that good it will result in sticking your food onto the grates. That is why it becomes essential to oil your grill every time you start grilling. It will prevent the stickiness of the food with the grates of the grill.
Moreover, there is some best oil for grill grates that are multifunctional. You can simply use them to cook and fry your food, you can use them in full body massage as well. Therefore, whenever you are purchasing an oil try going for the versatile ones.