“you do have to let it stand upright before plugging it in. The 24 hours is really overkill, though. There is only about 6 oz. of oil in them and it does not get disbursed all throughout the refrigerator when it in laid down, it is still in the compressor. It just has to drain back into the sump (bottom) of the compressor. The oil used in a refrigeration system is mineral based and is not as thick as say motor oil. An hour would be fine. Wait two if you really want to make sure.
I have been in teh refrigeration and air conditioning field for 15 years and have repaired many of them.”