Though certain oils are better for seasoning (see above), you can use any oil to cook on a flat top gas grill. Go with your preference, but in case you’re curious, our experts like avocado, coconut, and organic palm kernel oils. Peanut oil is also acceptable, though it’s prone to splattering on a griddle and guests may have a peanut allergy (always ask!). If all else fails, lard or rendered bacon fat will do just as well as cooking oils.