Every year I get some version of the same message: “I just bought a new grill, and the manual mentions seasoning it. Do I actually need to do this before I cook?”
Short answer: yes, in most cases. Long answer: it depends on your grill, and there’s a right way and a wrong way to do it.
I’ve unboxed more grills than I can count — cheap flat-top griddles, high-end pellet smokers, a Weber Genesis that’s still going strong eight years later. Almost every one of them needed some kind of prep before the first cook. Skip it, and you risk two things: food sticking to bare metal like it’s glued on, and a grill that rusts out way sooner than it should.
Here’s what seasoning actually does — and what it doesn’t do. Seasoning is a thin layer of polymerized oil that bonds to metal, creating a semi-non-stick, rust-resistant surface. It is not a magic non-stick coating like Teflon, and it won’t fix a badly rusted grate or make cheap steel behave like cast iron. It’s maintenance, not a miracle.
Before we get into seasoning, though, we need to talk about something that comes first: burning off your new grill. These two steps get mixed up constantly, and mixing them up is where most first-timers go wrong.
This guide covers the universal process, then breaks down what changes depending on your grill’s material — gas grates, cast iron, stainless steel, porcelain-enameled grates, griddles, and smokers, including pellet grills.
Burn-Off vs. Seasoning: What’s the Difference?
These are two different jobs, and confusing them is the single most common mistake I see.
Burn-off comes first. Every new grill ships with some combination of manufacturing oils, dust, cardboard residue, and packing chemicals still on the metal. Even if a grate looks spotless, it isn’t food-safe yet. Running your grill empty at high heat for 15–20 minutes with the lid closed burns off that residue before anything touches your food. You’ll usually smell it — a faint chemical or “new car” smell — and see a little smoke. That’s normal. Let it run until the smell is gone.
Seasoning comes after burn-off, and only on certain surfaces. It’s the deliberate process of applying a thin coat of oil and heating it past its smoke point so it polymerizes — basically hardens into a bonded, protective layer. This is what gives cast iron and carbon steel that dark, slick patina.
The mix-up happens when people either skip burn-off and season straight over factory residue (bad — you’re sealing chemicals into your seasoning layer), or they try to “season” stainless steel grates the same way they’d season a cast iron skillet (also not ideal — more on that below).
What Oils Should You Use (And Which to Avoid)
You want a high-smoke-point oil. Polymerization happens when oil gets hot enough to break down and bond to the metal — if your oil smokes and burns before it reaches that point, you get a gummy, sticky mess instead of a smooth seasoning layer.
Good choices:
- Canola oil — cheap, accessible, does the job. My default recommendation for beginners.
- Grapeseed oil — higher smoke point, seasons beautifully, costs a bit more.
- Avocado oil — one of the highest smoke points you can buy, great for cast iron and griddles.
- Flaxseed oil — popular in cast iron circles for a hard finish, but it can flake if applied too thick. Fine if you’re patient with thin coats.
Avoid:
- Olive oil — low smoke point, burns before it polymerizes properly. Skip it for seasoning, even though it’s fine for cooking.
- Butter or animal fats — can go rancid over time sitting on a grate between cooks.
If your manufacturer’s manual specifies an oil, use that. Some cast iron grate makers actually recommend a specific product, and it’s worth following that over generic advice.
A tip that took me embarrassingly long to learn: for cast iron and griddles specifically, a dedicated seasoning wax like a Crisbee Stik or Lodge Cast Iron Seasoning Spray applies more evenly than oil straight out of a bottle, especially for beginners who tend to overpour. They’re solid at room temperature, so you physically can’t glob on too much.
How Much Oil Should You Use?
Think “barely there,” not “glossy.” You’re aiming for a layer so thin it looks almost dry after you wipe it down. If you see pooling, streaking, or shine that doesn’t disappear when you rub it in, you’ve used too much — wipe off the excess before heating.
The best tool for this is a lint-free cloth or shop towel, not a regular paper towel. Standard paper towels shred against rough cast iron and leave little fibers baked into your seasoning. A folded shop towel held with long-handled tongs also keeps your hand well clear of a hot grate — worth the two dollars.
The Universal 4-Step Seasoning Process
This is the process behind every grill type below. Learn it once, and the rest is just small adjustments.
Step 1: Clean and Dry
Strip off every piece of packaging — plastic film on knobs, cardboard corner protectors, foam padding, stickers on the lid. I’ve seen people fire up a brand-new grill with a manufacturer’s sticker still stuck to the firebox. Don’t be that guy.
Wash removable grates with warm water and mild dish soap, per your manual. Dry them completely — and I mean completely. Any leftover moisture on cast iron will cause rust spots the moment heat hits it.
Step 2: Run the High-Heat Burn-Off
Close the lid and run the grill at a high temperature (check your manual, but this is typically 400–450°F) for 15–20 minutes. This burns off shipping oils and manufacturing residue. Do this outdoors, obviously, with good ventilation — you’ll get some smoke and odor, and that’s expected. Let the grill cool before touching anything.
Step 3: Apply a Micro-Layer of Oil
Once cooled (or per your manual, sometimes applied while still slightly warm), wipe your chosen oil across the cooking surface in a thin, even layer using your shop towel and tongs.
Step 4: Heat to the Polymerization Point
Fire the grill back up and hold it in the 400–450°F range for another 15–20 minutes. You’re looking for the oil to stop looking wet and start looking matte and slightly darker — that’s polymerization happening. You might see a light wisp of smoke; that’s fine. Heavy, thick smoke means you used too much oil.
Let it cool fully, then repeat with another thin coat if your grate needs it (cast iron almost always benefits from 2–3 coats; stainless steel usually needs just one light pass).
A quick note on weather: if you’re doing this in cold or windy conditions, your grill will lose heat faster and the oil may not polymerize as evenly. If it’s below freezing or gusty outside, expect to run the burn-off a little longer, or wait for a calmer day if you can.
Material-Specific Rules: Grates, Flat Tops & Smokers
The 4-step process above is your backbone. Here’s how it flexes depending on what you’re working with.
Cast Iron Grates
Cast iron is the material that benefits most from seasoning — it’s porous and rusts fast without protection. Dry it thoroughly after washing (a few minutes on low heat helps evaporate any residual moisture), then apply thin coats of oil, heating between each one. Two to three coats before your first cook is typical. After every future cook, wipe it down while still warm, dry it, and apply a light fresh coat — that ongoing habit matters more than how many coats you did on day one.
Stainless Steel Grates
Here’s something that surprises people: stainless steel doesn’t need seasoning the way cast iron does. It’s naturally corrosion-resistant. What it does benefit from is the burn-off, plus a very light oiling before the first cook to help with food release and prevent that “everything sticks” experience new grill owners dread. Don’t overdo the oil here — stainless can develop a blotchy, discolored look if oil pools and bakes on unevenly. A quick wipe, not a coating, is the goal.
Porcelain-Enameled Grates — Read This Before You Touch Them
This one’s important, and it gets skipped in a lot of grill guides. A lot of mid-range and premium gas grills — think Weber Spirit and Genesis lines — use porcelain-enameled cast iron grates. These look like bare cast iron but they’re not, and treating them the same way will cost you.
Do not season porcelain-enameled grates like raw cast iron. The enamel coating is the protective layer already — it doesn’t need oil polymerized onto it, and aggressive heating cycles or metal scrapers can chip that coating right off, exposing bare metal underneath that then rusts. For these grates: wash them, run your burn-off, and give them a very light wipe of oil before cooking if you want extra insurance against sticking. Skip the multi-coat seasoning ritual entirely, and never use a wire brush or metal scraper on them — a nylon brush is the safer call.
Griddles and Flat Tops (Carbon Steel)
Griddles — whether it’s a dedicated flat-top or an attachment for your grill — are usually carbon steel, and they season similarly to cast iron but build up patina faster because of the larger flat surface. Clean, dry, apply a thin oil layer, and heat until it darkens and stops looking wet. Repeat for several thin layers rather than one thick one; this is where I see the most rookie mistakes, because a big flat surface tempts people to pour oil on generously instead of wiping it thin. Don’t. A properly seasoned griddle will have an even, dark, semi-glossy patina — patchy or streaky color usually means uneven oil application.
Smokers and Pellet Grills
Seasoning a smoker isn’t just about the grates — it’s also about conditioning the interior chamber, which helps seal the metal and can improve smoke flavor on early cooks. Follow the manufacturer’s burn-in temperature and duration exactly; some smokers specify running empty at a moderate temp (around 275–300°F) for an hour or more rather than a quick high-heat blast.
Pellet grills need extra care here. Unlike a gas or charcoal burn-off, a pellet grill’s first startup involves priming the auger — feeding pellets into the firepot for the first time. Rushing this or skipping the manufacturer’s startup sequence is a real cause of auger fires, where pellets ignite in the feed tube instead of the firepot. Always follow your pellet grill’s specific startup procedure to the letter on that first burn — this isn’t a place to improvise.
Once the chamber burn-in is done, season any cast iron or porcelain grates according to the rules above, based on what material they actually are.
5 Common Seasoning Mistakes to Avoid
- Skipping the burn-off and seasoning straight away. You’ll trap manufacturing residue under your oil layer.
- Using too much oil. Pooling oil leads to a sticky, gummy finish instead of a hard, smooth one — the opposite of what you want.
- Treating porcelain-enameled grates like bare cast iron. You’ll chip the coating and create a rust problem that wasn’t there before.
- Using a low smoke-point oil like olive oil. It burns before it can properly polymerize.
- Cooking before the oil has fully heated and set. Give it the full heat cycle — rushing this step is why food sticks on a “seasoned” grate anyway.
Long-Term Maintenance
Seasoning once isn’t a lifetime fix — it’s a foundation you maintain.
- Clean grates while they’re still warm; stuck-on food comes off far easier than once it’s cold.
- Dry cast iron and carbon steel completely after every wash — standing water is public enemy number one for rust.
- Apply a light oil wipe after cleaning if the surface looks dry or dull.
- Check cast iron periodically for rust spots and re-season that specific area if you spot one, rather than stripping the whole grate.
- Use a nylon bristle brush instead of a wire brush where possible — wire bristles can strip a hard-earned seasoning layer (and, worse, occasionally shed bristles into your food).
- Invest in a decent grill cover. Water sitting on a freshly seasoned cast iron grate overnight will rust it despite your best seasoning work — I learned this one the hard way with a grate I’d babied for weeks.
- Wear heat-resistant gloves rated for high temps when handling hot grates during seasoning or cleanup — a lot of minor grill burns happen during exactly this kind of “quick” maintenance task where people get casual.
New Grill Seasoning FAQs
Do you have to season a brand-new grill? In most cases, yes — at minimum you need to burn off manufacturing residue. Whether you also need to oil-season depends on the grate material; cast iron and carbon steel benefit most, stainless steel needs less, and porcelain-enameled grates need the least of all.
How long should you burn off a new grill? Typically 15–20 minutes at high heat (400–450°F) with the lid closed, though you should always check your manufacturer’s specific recommendation first.
What is the best oil to season a grill with? A high-smoke-point oil like canola, grapeseed, or avocado oil. Avoid olive oil and butter.
Can you season stainless steel grill grates? You can lightly oil them for food release, but they don’t need the multi-coat polymerization process cast iron does — stainless is already corrosion-resistant on its own.
Do cast iron grill grates need to be seasoned? Yes, and it matters more here than almost anywhere else. Cast iron is porous and rusts quickly without a seasoning layer.
Can I use olive oil to season grill grates? Not recommended. Its smoke point is too low, and it tends to burn rather than polymerize cleanly.
How often should you season grill grates? For cast iron, a light re-oil after most cooks and a fuller re-season if you notice dullness, stickiness, or rust spots forming.
Should I oil my grill grates before or after heating? Apply the thin oil coat, then heat the grates so the oil polymerizes and bonds — heating comes after oiling, not before.
Can you season a grill with the lid open? You can, but closing the lid heats things more evenly and consistently, which usually gives a better result.
How do I know when my new grill is ready to cook on? After burn-off is complete, the seasoning oil has fully heated and set (matte, not wet, appearance), and everything has cooled enough to handle safely.
Final Checklist: Seasoning Your New Grill for the First Cook
- ☐ Read the manufacturer’s instructions
- ☐ Remove all packaging, films, and stickers
- ☐ Wash and dry grates completely
- ☐ Identify your grate material (cast iron, stainless, porcelain-enameled, carbon steel)
- ☐ Run the initial high-heat burn-off
- ☐ Apply a thin, even coat of a high-smoke-point oil
- ☐ Heat until the oil polymerizes (matte, not glossy)
- ☐ Repeat with additional thin coats if your material calls for it
- ☐ Let everything cool completely
- ☐ Your grill is ready for its first cook
Want this as a printable, save-it-to-your-phone version? Grab our free New Grill First-Cook Checklist — just enter your email below and we’ll send it straight over, along with a couple of tips we didn’t have room for here.
Related reading: Best Grill Brush · How to Clean a Grill · How to Clean Stainless Steel Grill Grates · Best Cast Iron Grill Grates · Best Grill Covers · Best Grills for Beginners