Preheat Engine -

Are you asking about a or an external heater (like a block heater)?

Generally recommended when temperatures drop below 10°F–20°F (-12°C to -7°C). PREHEAT ENGINE

To give you the most relevant information, could you tell me: Is this for a or an aircraft ? Are you asking about a or an external

"PREHEAT ENGINE" refers to the process of warming an engine's internal components and fluids (oil and/or coolant) before starting it in cold weather, usually at or below 20°F (-7°C), to reduce wear and ensure a successful start. usually at or below 20°F (-7°C)