Most vehicles have a removable cap on the to of a valve cover to add oil. Coolant is added either into the radiator overflow bottle, of the radiator itself depending on how the system is designed to have it added.
It can cause engine damage, watert is not a lubricant.
You put engine oil in at the oil fill cap. It is normally located on the valve cover.
Take the oil cap off of engine and pour in oil.
friction
the thick liquid would plug your radiator and ruin your water pump. and destroy your engine.
The viscosity of the oil may not be heavy enough to protect the engine.
Drain the engine oil, change the oil filter and put in the required amount of oil, run engine, shut engine off, then make a mark on the dipstick indicating the full line for future reference.
Yes, never put oil formulated for a diesel in a gasoline engine.
Whatever the manufacture recommends.
it will seize up
Engine Oil
it will over heat, and crack. palm oil is much too flammable to be inserted into a car engine.