It is dark and thick
Crude oil is thick and black coloured.......
Most likely the oil is too thick also the oil system may be worn enough that the connecting rod bearings are not getting enough oil at first
You shouldn't refridgerate olive oil. It makes it thick and sours the taste. In a dark cool cuboard it will keep for 6 months.
more then likely you really need an oil change with a lighter oil so when it gets cold the oil doesn't get so thick and hard to move.
The engine is burning oil
The oil light come on if there is not enough oil pressure. When you first start up, the oil pump needs a little time to build up the pressure. However, you should check that the oil reservoir is full with the dip stick (with the car cold and on level ground). It may also be that the oil and oil filter were not actually replaced properly at the car's last service, so that the oil is thick or the filter is clogged and this is delaying the build up of pressure. To be on the safe side you could have the oil and filter changed.
oil is emulisifieing,drive the car at the speed limit on highway for 25,30 miles at a time, this will get the oil up to correct operating temp.
That must mean the oil in your vehicle has degraded by 19% which also means the oil still has quite a bit of life to it.
It is very cold or needs changing because it is too old.
oil flow restriction or weak oil pump
Blown head gasket.
oil slicks arent very thick or very thin it is about a half of a foot