Which fluid is NOT typically flammable?

Motor oil is the correct choice as it is not typically flammable under normal circumstances. While it may ignite when exposed to a significant heat source or flame, the flash point of motor oil is generally higher than that of gasoline and many other automotive fluids. This means it requires a higher temperature to catch fire.

Gasoline, transmission fluid, and brake fluid are more likely to ignite or burn easily at lower temperatures, making them hazardous in situations involving fire or extreme heat. Understanding the properties of these fluids is essential for safe handling and maintaining a safe environment around vehicles. Recognizing which fluids are less likely to ignite can help in making informed decisions about vehicle maintenance and emergency responses.