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Cast iron rule
(sh.itjust.works)
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this post was submitted on 04 Oct 2025
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Most spray oils are high smoke point for frying, which is the opposite of what you want for seasoning
What? You want high smoke point oils for seasoning. You want to season the pans in temperatures higher than you would be normally cooking in, which means higher smoke point oils. I season all of my cast iron and carbon steel with canola, works great.
If you season with Extra Virgin Olive Oil, it's going to burn the seasoning off under normal circumstances.
https://sherylcanter.com/wordpress/2010/01/a-science-based-technique-for-seasoning-cast-iron/
tl;dr Flax oil is best, low-smoke-point oils in general polymerize better, resulting in better and tougher non-stick coatings, but there's more to it than just smoke point
I mean, there are a lot of types of spray cooking oil I’ve seen. Coconut, olive oil, and soybean (vegetable oil) are what I see most commonly, and none of those have particularly high smoke points.