The definition of feline is an animal that belongs to the cat family, or has the characteristics of a cat. An example of feline is a Siamese cat. An example of feline is a woman house burglar who is stealth and supple. A feline is defined as an animal that belongs to the cat family.
Mobil One and other oil manufacturers recommend checking engine oil levels before driving your vehicle, when the oil is still cold. However, some manufacturers will recommend checking the oil after you've warmed up the engine, so check your owner's manual to find the specific recommendations for your vehicle.
The temperature gauge (or cold and hot indicator lights) typically measure the temperature of the engine coolant itself. When the car is first started, the engine is cold, and oil will need time to heat up and achieve good flow for lubrication. Until that temperature is reached, the engine is more susceptible to damage at high revs or under load. Guidance is to drive relatively gently until the low temp light goes out. In a highly tuned car, with tighter tolerances, this is even more important. So treat it as a gentle warning.