We’ve had our 350h for about a month with ~1450 miles.

we drive pretty conservatively and don’t floor it from stops and being in Dallas it’s mostly flat roads.

before and after the resets below the speedometer I am consistently only getting 33.7. Even after resetting and driving about 10mph in the neighborhood it always defaults to 33.7 and only move +/-.2

i am seeing others that is getting close to 40mpg but I’ve never got over 33.9.

we mostly drive city jus to take kids to school and back so no need for speeding and a lot of school zones.

is this something I should take the car to the dealership for?

 

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Use a gps unit to check the mileage and it should be much more exact. Then compare the two. Do you know how to do that?

You can also check the odometer accuracy by using a mileage marker over a long section of highway.

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The range of mileage people are getting has a range in the 30s and 40s https://www.fuelly.com/car/lexus/nx350h/2022

 

Looks like 39 is the mid point and I am stuck ~33

should I be concerned? Or take it in for a check up?

 

Trip mileage (around town mostly) varies 36 - 45.

We went on a day trip, mostly highway doing 65 to 70 mph, and we averaged 38 based on fill up after the trip.

Wife driving around town is getting low 40’s. Her car and she drives it faster than I do when I drive it.

Add: We have 18” wheels and tire pressure we keep at 37 cold.

 

Note that, with hybrid vehicles, if most of your trips are short distance trips, your fuel economy is likely to be worse than it otherwise might be because, when you start the car, the ICE has to run a greater percentage of the time until the ICE has warmed up to its normal operating temperatures. And, when you shut the car down after a short trip and, then, re-start it a bit later, the ICE needs to go through that process of warming up again. On the other hand, if your driving is with longer trips, once the ICE warms up, the vehicle will be able use the electric power more of the time, which will result in better MPG.

 

Curious; do you have 18" or 20" wheels?

 

20" wheels

 

Have ya checked yer tire pressure? What grade of fuel and and how much ethanol? How long are your trips? As others have stated, if they're really short - just a few minutes, that's definitely part of the issue.

Personally, the NX is my first ever hybrid. It's taken me a little bit to sorta figure out to "relearn" braking a bit. It really pays off to start braking a lot earlier than I was used to and a lot gentler. This may sound obvious, but ideally yer keeping an eye on what's happening WAY ahead of you (traffic lights, other cars on the highway etc...) and are able to plan accordingly long before you "need" to make a decision - let off the gas if the light just turned red but it's way too early to begin braking for example. (before the hybrid, I'd maintain my speed much longer and just brake harder to stop quicker.. but with the hybrid this just kills the MPG and in all cars is ultimately a waste of energy - hybrids are just really good at SHOWING this to you with the fun energy gauges/EV indicator!) This way, you keep the braking in the "regen" area and never max it out, which effectively wastes energy in addition to giving the engine more time to switch off. Think chauffer driving, where your passengers aren't aware of your stops and starts and it'll probably help yer MPG! (although chauffer driving is probably a bit extreme for everyday driving...)

 

I have the 18 inch wheels and was getting 43 mpg but the mpg went down when the weather got colder. And then I got Michelin Defender LTX ms tires which will be better in snow than my run flats. My mpg in cold weather is like 35 to 37mpg now. I think the tire pressure cold is 34.
question is are you driving in cold weather now?

 

tire pressured are what is on the door panel on all 4 wheels and I am in Dallas and our temps been in the 70s. fuel been using 93 octane. short trips/long trips about the same average 33.7 for city and ~ 28 for HWY.

I even tested by driving the car about 30 minutes so that it was warmed up then reset all the history and drove it again mostly in flats and in normal driving style and still got 33.7.

On our other car which is phev ~ 900 miles and we are still with the first tank of gas and we drive that one more aggressive but even on none ev/hybrid modes getting better mpg (x5)

 

I believe that the screen you are looking at is "Total average fuel economy" - that is your average from the very start (0 miles). There is another screen that shows "Trip average fuel economy". Switch to that screen and try driving more carefully and see how this impacts your fuel economy per trip.

 

My wife had a 2009 Prius. It taught me how to drive for better fuel efficiency. As always--it depends how you drive. My Driver's Ed teacher in high school (1965) would admonish us not to 'hurry up and wait' to get to red lights. To maximize MPG with a hybrid is the same driving tactics to increase your MPG with a conventional power system.

 

There has been another forum member who posted a ton about his crappy mileage (w/ 20" wheels), and had a loaner w/ 18" wheels that got decent mpg. I have 18" wheels and have gotten 42mpg thru 5K. No surprise, my mpg has dropped (to 38mpg) in the cold weather.

 

My last two fill ups have been at 33 mpg which I attribute to the cold weather and the clod hopper winter tires.