Into the weeds engine design for fuel efficiency discussion.

mgoblue9798 said
I have that engine in my 300 and combined with the 8spd I love it. Don't know that it would be up to towing duty though.

I have thought that the 3.6 8spd combo in an A body should be capable of knocking down 30mpg though.

If you could divorce the Body computer from the engine management computer then just use the whole engine wiring harness in a A body.

Way too much work for me.