If everything is factory new then I doubt you will get much improvement unless you go with one of breathing system upgrades.
The other option is to buy an aftermarket tune for your computer. But that will probably void your warranty.
Best advice is to ask others with the same unit what they are getting. If you are way on the low end and already drive with a light foot and slow top speed then you may want to inquire of your dealer if they could do a check of your engine. Could have something bad out of the box.
I always use severe duty maintenance on my tow vehicles for oils, lubes, rotations, etc.
Last thought, sometimes mid grade or premium helps but may not be worth the added price/cost. Maybe run down low and buy a higher grade fuel?
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
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