I’ve continued to use a 80w90 GL-5 in my ‘15 and replacing every 25-30k miles (~40,000–48,000 km)
IIRC.. you can get up to 50% power transfer to rear when needed but pre-load backed off from the ‘13-‘16.5 models to 0%.. starting with ‘17 I think for MPG
There were some articles on it years...