I moved the refridger and noticed oil in the water drip pan .Is this normal?

To rare because the refrigder no has oil enywhere

This would not be normal. Whoever if the fridge is running and keeping good temperature I would have to say that it's likely that something was spilled in the fridge. If it's struggling to cool then you might have a damaged refrigerant line, and this would most certainly mean an emanate fridge failure.I suggest that you clean and replace the drip tray, and inspect the inside of the fridge for any spilled materials. I would also suggest that you look closely for any small rodent **** like mice. Mice can carry food and use this dark place for a home.