I found this and it seems to answer that:
"The same, tired oil thread. Yet again.
A 626,000-mile 3.6L Pentastar ran on 20 weight oil: https://www.macsmotorcitygarage.com/video-inside-a-chrysler-pentastar-v6-with-626000-miles/
And straight from the horse's (engineer's) mouth, for the millionth...