What type of oil for the kia 4 by 4 sportage 2000

I would think how much you like living life. You should only do this type of job with a 3\4 ton truck something with more weight than the vehicle you are towing. This will be dangerous and would advise not to do so.

you may have a oil filter with a bad gasket or no gasket replace the oil filter

If oil is on the spark plug tip then it could be from worn valve stems or from worn piston rings. When you accelerate away from the traffic lights and the engine blows a lot of greyish smoke then this is a sign of worn parts.
If the oil is leaking into the spark plug hole, then it could be leaking from the tappet cover, either the tappet cover bolts are loose or the tappet cover gasket is faulty.

if the oil level is full and there is no engine noise when the light is on you may just have a problem with the oil pressure switch that has gone bad and needs replacing.

this is realy a mechanics area of expertise not for you to be doing your self cause of its location

vavle cover gasket is leaking.and thats why oil is in with the plugs.change the gasket and solve youre problem

well what i would do first is smell the transmission fluid if it smell burnt the transmission must come out,if not drop the valve body and check for a stuck valve or a check ball stuck in the separator plate try that over and out joe cool

On this website you find fuse box diagram and description for KIA Sportage (2000)

https://www.carknowledge.info/kia-sportage-2000-fuse-box-diagram/
https://www.autogenius.info/kia-sportage-2000-fuse-box-diagram/

go to autozones website and type in your vehicle under parts locator section