15 minutes high for searing, 10 minutes low for smoking.

Preheat a gas grill on high for 15 minutes for searing; for low and slow, preheat on your target temp for about 10 minutes once it gets there.

Searing needs screaming-hot grates. That takes time because the metal has to absorb heat. 15 minutes on high (lid closed) gets the grates hot enough to sear steak without sticking. Any less and you lose the crust.

For low and slow (250°F or so), you don’t need hot grates — you need stable air temp. Set your burners to low, close the lid, and let it climb to your target. Once it hits