Here is what the Kia 2020 Sportage OM has to say :
Theta II 2.4L GDI engine (5 qrts.) 5W20 , 5W30 and 10W30 acceptable . From experience , I believe best to run a synthetic 5W30 or 10W30 oil (warmer climates above 15 degrees F.) for added film strength and protection from fuel dilution DI engines are known for .
The Theta II 2.0L Turbo GDI engine (5 qrts.) recommends 0W30 , 5W30 , 5W40 , 15W40 and 20W50 (no 5W20 oil !) . Most people have the best protection and success using the 5W40 synthetic oil in the Sportage 2.0 L turbo engine . For the Sportage non - turbo 2.4L engine it is best to keep your OCI at 5,000 miles max / 6 months (wherever comes first) . With my 2.4L non - turbo engine I prefer 4,000 miles max / 4 months (but that is in large city / suburban driving conditions). In the Sportage 2.0L turbo engine you should keep to 4,000 miles / 4 months max (whichever comes first) as the 2.0L turbo is pretty hard on oil ... As for oil brands I would consider starting with Quaker State Full Synthetic 5W30 or 5W40 from Walmart (depending on Sportage engine) . Later you can then explore Mobil 1 , Valvoline , Pennzoil , etc. synthetic oils - but rest assured your Sportage engine will do very well with the lower Priced Quaker State Full Synthetic oils ... Hope this helps !