Quote Originally Posted by Joflewbyu2 View Post
I made a mistake. I just checked and mine has 4 wire O2 sensors which are heated. I was looking at getting O2 eliminators and the site I was on stated 01-14 were 2 wire sensors and 15+ were 4 wire heated. Should have checked before posting.
No problem. I usually post from memory and that's not always a reliable source!

But something definitely changed on my 2016. It runs fine on 87 octane fuel. But in very hot weather I had to use premium fuel in my 2013. I remember accelerating hard from a stop one extremely hot day. The engine started pinging noticeably. But in a moment it stopped, then started again. It continued that cycle a few more times. I assume the engine's computer detected the knock an made incremental adjustments to the ignition advance. From that day forward I always used premium except on chilly winter days.