Category	Temperature	Features
Luke-warm	70 - 110 C 158 - 212 F	Smokeless, soundless, calm oil surface.
Hot oil	110 - 170 C 230 - 338 F	Slight smoke, oil stirs from the side to the center of the wok
Very hot oil	180 - 220 C 356 - 428 F	Smoke, the surface remains calm and when stirred, sizzling sound is heard.