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.
Almost swear that the head gasket has minute cracks that enlarge when very cold (gasket shrinks) to permit coolant to leak into cylinders. This has been common for past two years in cold weather. Nothing in oil per oil analysis and this year I have seen some drops underneath engine as well. Cannot figure out what is going on. Level has dropped some also. Sure would love some experts to chirp in with opinions for all of us affected by cold weather coolant leaks