2015 CX-5 2.5 SkyActiv coolant in oil


2016 Mazda CX-5 GT AWD w/Tech Pkg
Plano, Texas, USA
⋯ I pushed a paper towel into the coolant reservoir, hoping to catch any little bit of slime that might be in there, and wiped the dip tube. Nothing.
How about just open the metal radiator cap itself and check any sign of oil floating on top the the coolant?
2015 CX-5 GT
The chemical test is done directly from the radiator. That was the part referencing a white rag, above. Didn't want to risk the paper towel coming apart in the radiator.