I agree, I have no idea what my TJ did. It was the 2.5L/5-speed manual with 4.10's. I didn't buy it for the fuel mileage (and that is a good thing...).
Now my 2021 Unlimited Rubicon is bone-stock, with the 2.0L Turbo/8-speed automatic, and I LOVE it. Wifey and I putzed around yesterday after...