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.
Most owner's manuals will advise you to check the oil level when the engine is warm (after driving 10 or 15 minutes), about 5 minutes after you stop the engine. This allows the warmed oil to be fully circulated in the engine, and then drain down to the oil pan where its level can be measured by the dipstick.