I have a 05 Chrysler T&C that I've been hypermiling.
Did the same on a previous 97 Dodge GC.
Your commute seems much more highway than mine, So slower speeds will help.
Mine is much more like city driving.
Some idea's that work for me.
Turn off the A/C. It's an unbelievable pig on fuel.
If needed, I turn it off/on at 5 min intervals. Also turn it off on hills.
Try to let the engine shift at around 2000 rpms.
Get the van into OD ASAP. It kicks in at 40 mph, But after you hit it, you can slow down as low as 32 mph and run under 1300 rpm. Great around town.
Your tire pressure sounds good.
Mine is 44psi. Tires max.
I've had some great luck FAS'ing. But since the van is so heavy, Its mostly rolling to stop lights. (It really runs up the mpg)
I don"t do it at cruising speed. The T&C manual states it can be flat towed up to 100 miles and at speeds lower than 44 mph. So a fast FAS makes me nervous.
N-ICE works very well but no big gains. Its steering control is much better.
I do this a lot.
Rolling is very good on this van.
Highway is 32+ mpg on a long road trip.
Around town it's closer to 18.5, Some are 24 mpg.
Most are short trips.
A lot of repeated info to what your probably doing, But every one helps.
Let us know if you have any techniques that are working for you.
I really want to hit 35mpg.