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.
If you run the car in cold weather, the fuel mixture is richened to warm engine, excess fuel not burned can get into the oil. Also, if you have a car that starts hard-long cranking or has a misfire; the excess gas that is not burned will get into your oil.