What will happen if you put crude oil in your plants?

Crude oil is the oil in tankers or pipelines going to refineries. It is a complex mixture of compounds. Now, all plants need to breath. A plant that is covered in oil and that cover is maintained, will likely die.

This can happens when a oil storage tank leaks. The environmental damage can be quite extensive.

However, with some plants, if they are sprayed with oil, will drop their leaves and grow new ones. If it is a very light oil, and the oil does not coat the underside of the leaf, it may do little damage. Very hard really to generalize as some plants are really resilient to contaminants.