No, use only the weight oil as recommended by the manufacture.
Yes, you can mix them.
No, you add oil at the oil fill cap on top of the engine.
Through the oil filler cap on top of the engine
Open the OIL FILLER cap--on the top of the engine- and add oil.
On the top of the engine there is a cap on the top of the valve cover pan. Unscrew the cap and add oil there.
On newer cars it is a copy on the top of the engine marked "OIL".
No. Use the recommended oil, otherwise you might shorten the life of your engine. Engines are expensive.
Yes you use engine oil in all cars regardless of transmission.
in the top of the engine there is a cap with an oil can sign on it . Fill the oil in there. Be care not to over fill as it can cause the engine to cease!
It should say on the engine oil cap on top of the engine, I believe it's 5w30
On the top of engine in a casing in the front of the engine
The oil filter is located at the bottom of the engine. It can be remove with an oil filter wrench. Do not remove the engine top cover unless you need to repair something very major.