Use exactly what the manufacture recommends which is a multi-viscosity oil covering all temperatures.
To a degree, but if you are concerned use lacquer thinner.
The oil will appear thinner than usual. Do not mistake this for oil that is thinner at higher temperatures. Also, it should have a different smell than regular oil.
Use exactly what your owners manual recommends. That is more than likely SAE 10w30 which works well in all seasons.
Just use a 5w20 oil all the time. Use a thinner oil in winter if you live in a cold climate, but a 5w20 oil can be used in most all situations. In extreme cold, a thinner oil will travel up to the valve train way sooner, thus protecting your engine.
The grade of oil your vehicle uses is determined by what geographical area you live in. The colder the weather the thinner the oil. The warmer it gets the thicker the oil. Most vehicles use 10-w40 grade Motor oil. Your handbook will have the specific grade that your car needs to use.
Canola is thinner
You should not use kerosene to thin any paint. It will not mix with water based paints, and it is too dirty for use in oil based paint as an effective thinner. When using oil-based paints, Mineral Spirits is the preferred thinner for brushing and cleanup, while VM&P Naphtha is used for spray applications.
If it's zero degrees F or less you should use 5w20. Otherwise it might leak out faster and your valves might tap at start up. remember; very hot outside or old car use thicker oil 10w30 or 10w 40, very cold out side or brand new car use thinner oil 5w20 or 5w30. for the best lubrication use the thinnest oil you can, but the thinner the oil the faster it will breakdown in extreme heat
You need to use a paint thinner like terpentine.
Thinner.
Thinner weight oil flows more easily that thicker oil. Most new cars today use SAE 0w-20 or SAE 5w-20 weight oil. This weight will protect you in all temperatures. If however you drive an older car that uses SAE 10w-30 or SAE 10w-40 weight oil then you might want to use a slightly lower weight oil in extreme cold.
No, you use water to thin latex paint. Thinner is for oil based paint.