I don’t remember what year it changed or if it was simply start of Gen 2 but Gen 1 has about a 1% pre-load of power always sent to the rear diff. IIRC.. that was removed in later years
'16 CX-5 Sport AWD ~360,000 miles (~579,363 km)
https://www.toyotaofbend.com/inventory/used-2016-mazda-cx-5-sport-awd-4d-sport-utility-jm3ke4by1g0687334/
Looks like 0W-16 started to be used in Japan in late 90s...or development started
https://www.eneos.us/blog/the-skinny-on-0w-16-oil
https://www.noln.net/home/article/11498114/the-skinny-on-ow-16-oil-2017-06-30
Some interesting info in this link too...
IMO: Fluid weights and brands will never be a settled topic... it is up there with politics and religion
If I don't have oil consumption or leaks over a long period of time I'm good with it... that is just me though... and IMO
I’ve been running 0W-20 for over 10 years in my CX-5 and a little less in a 1UR-FE in my GX 460. No noticeable oil consumption. It’s not called for in the turbo Mazdas so I wouldn’t run it there.
Unfortunately, IIRC.. if there was never a reported service visit on TSB issue they won't cover it. Always a chance of dealer goodwill in the matter but they aren't obligated. If this turned into a safety recall for some reason then that would be covered.
After all these years... finally did this on my '15. I had a flickering LED bulb so wanted to shut it down.
I have the Bi-Xenon HIDs in mine and stock had the halogen bulbs for DRL that were replaced with LEDs a decade back.
OP likely has an OBD tool if they are playing around with this
https://mazdas247.com/forum/t/mazda-cx-5-2013-ecu-bench-connection-to-godiag-pinout.123882079/