Brand new oil, as in right out of the bottle, isn't really hazardous. It does become hazardous after putting it into the engine. The oil picks up unburned hydrocarbons which can be very hazardous.
Under OSHA's Hazard Communication standard, yes, it is. This includes oil used in a vehicle engine, such as 10W30 motor oil.
Put your old engine oil into an empty oil jug (save your jug from previous oil change) and drop it off at the hazardous waste section at your local dump. If you are fortunate, then your town might host a hazardous waste drop off at a public place... And that's free. Most places that sell engine oil will take your used oil and recycle it for you free. Now if you are asking where to pour oil into the engine when changing the oil, look on the valve cover for an oil fill cap. On modern engines it will even list the correct weight. If you cannot find the oil fill cap then drive to an auto repair shop and they will show you where the oil fill cap is. You might want to pay them to change it while you are there and show you what should be done.
Yes, they are considered hazardous waste
Depending on what it has been lubricating and where, used lubricating oil may be a hazardous materials. Specially formulated lubricants may also be hazardous if used improperly or carelessly.
Canola oil and peanut oil are foods and not hazardous materials. If you have a volume you may want to find a recycler or someone who burns it in their car after processing.
fertillizer oil gas and gasses
Because they will burn and explode
Oil based paint isn't waste, so no, you would not need a hazardous waste manifest to transport it.
Drain the oil and take it to your local hazardous waste disposal facility.
Crankcase oil is engine oil , so yes
I believe oil is considered hazardous waste and you need to have it professionally removed.
Mineral oil should be disposed of at a hazardous waste facility or through a professional hazardous waste disposal company. It should not be poured down the drain or disposed of in the regular trash as it can harm the environment.