Originally Posted by Stewie
Cast iron cooks much hotter. It's not that it IS hotter, but it doesn't lose heat due to its mass. Don't use olive oil and if you normally cook on medium-high, turn it down to medium. It definitely depends on your cooktop.
I'm not sure what you're talking about when you say "shitty" oil. Canola is a better option than olive oil, but for high temperature cooking I use soybean oil. When cooking with cast iron you're not looking for flavor from the oil, you're looking for performance.
I've started using ghee as my high-heat oil. Very tasty, easy to make at home, and ver high smoke point.