Any ideas where this might be coming from? Maybe one drip every 2 days. It's oil.

 

Same side as the oil filter. Perhaps oil cooler? They are known to leak. I'd clean up the road grime from the engine so you can better tell where the leak is coming from.

 

I use dye to help find oil leaks on the generators I work on. Need the UV flashlight to see it. Guessing clean the dirty areas around it where you’re seeing it, add some dye, drive it for a bit and do some research with the flashlight.

 

Looks on the case half split? My guess is the rms or imsb cover.

 

Clean it and drive it for a few miles. Then get a borescope up there.

 

Seems like rms to me but it’s a heck of a job so investigate more.

 

Spark plug tubes? Common enough problem in our cars.

 

Small wager it’s the RMS.