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.
Water in your automobiles engines oil is not good. Where can water enter the engine and get into the engine oil? Generally speaking the most likely places would be a blown head gasket or a cracked head, where anti-freeze or water if you only use water in your radiator, can enter. The liquid is either water or anti-freeze coolant. Water can enter the engine oil if you have a rambunctious 8 year old boy who wants to help his dad out by filling the engine with oil, except at 8 years old, water will work fine. The next thing you know he is filling the gas tank with the garden hose. Ask my dad!!