an engine is a internal combustion device for powering something and a motor is an electrical device for powering something, you are working on an engine so it will say engine oil. read more
Yes, they are the same. Some people call an automobile engine a motor and some people call it an engine. read more
Engine oil is never the same as “automatic transmission fluid” also known as ATF but sometimes the same oil is used in manual transmissions, it should say in your owners manual what particular lubricants are specified for each, as well as the quantity required for a refill. read more