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Hello! I have had my 2018 Nissan Armada Platinum AWD for about 18 months now, and I just hit 18,000 miles.
I use the Fuelly App to track my fill-ups, and from new, I have averaged only about 9 mpg city driving. I have gone on 2 road trips with it, and got 16 mpg on those.
I have taken it to 3 different dealerships, and all said "If the check engine light is not on, then there is not anything wrong." One of them did some type of firmware update, but that did nothing.
This car replaced my 2004 Infiniti QX56, which I had for 14 years and put 150,000 miles on, and I averaged 12 mpg city driving in it.
Has anyone else seen anything like this?
Please Help!!!
 

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Your vehicle is a heavy full size SUV which uses a 5.6 L V8 engine so don't expect to get MPGs like smaller SUVs with v6 engines. City driving is hard on MPG; lots of stop and go , idling. IMO, 16 MPG highway is good for your type of vehicle.
 
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