RX350h MPG
Pole Position
Joined: Jan 2005
Posts: 3,314
Likes: 542
From: Florida
“Crazy driver” is a huge grey area. Even in ECO you can get poor mileage.
If one is not getting above 30, something is wrong with the vehicle or the driver’s foot. I would be disappointed for sure.
If one is not getting above 30, something is wrong with the vehicle or the driver’s foot. I would be disappointed for sure.
Intermediate
Joined: Feb 2022
Posts: 286
Likes: 147
From: AR
I know this is a great debate topic but has anyone actually tried running on 91 versus 87 and noticed any measurable difference in MPG? I plan to run it on 87 if there is only a 1-2 mpg hit on the efficiency. I have 400 miles on the odometer and am still on the original tank the dealer provided which I understand to be 87 based on what I read here. At this time I'm not quite hitting the 37 mpg city mark yet but its a new engine that needs to be broken in I presume. Thanks in advance, this will help me avoid having to do my own experiment.
Advanced
Joined: Feb 2023
Posts: 649
Likes: 377
From: VA
Try figuring the miles by calculations and compare it to the computer reading. I have seen the computer be off by 1-2 MPG. Also make sure you are clearing the full MPG history, not just the current tank. If you don't the car will take the average from day 1 and that would lower the #. Also keep the car in ECO mode all the time.
Intermediate
Joined: Feb 2022
Posts: 286
Likes: 147
From: AR
Try figuring the miles by calculations and compare it to the computer reading. I have seen the computer be off by 1-2 MPG. Also make sure you are clearing the full MPG history, not just the current tank. If you don't the car will take the average from day 1 and that would lower the #. Also keep the car in ECO mode all the time.
Pit Crew
Joined: Nov 2022
Posts: 120
Likes: 79
From: NC
Are you guys really getting that kind of mileage on your 23 350h? I wonder what I'm doing wrong. I'm getting between 33 and 34.5 with 970 miles on the car. I know it needs to break in but so do yours. I hope it will get better. And I'm burning premium. I wonder if I would do better with 87...
I also don’t know how you can accurately compare the different octane levels. One day the same trip you take may include no stops at red lights, the next day it may include ten stops at red lights, along with several other variables you can’t control. I don’t think there is anyway the additional money you spend on higher octane fuel will yield a better cost per mile.
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6th Gear
Joined: Feb 2023
Posts: 6
Likes: 3
From: California
Try it. Go on several short trips so that the system never warms up (keep it down to 1-2 bars), but space the trips out so that the engine cools down to one bar each time. You'll probably average below 20 mpg. I did it when I rented a Gen II Prius long term and averaged 19 mpg. It's one of the advantages of going diesel since diesels deliver hybrid-like fuel economy immediately.
It's a problem I run into with my 350h. I go back and forth to work (4 miles) and it will only get 25-28 mpg. It warms up 1-2 miles in, but those first couple of cold miles are 15-20 mpg, followed by a couple of warm 35-37 mpg miles.
Most cars are rated city/highway. Hybrids should be rated cold/hot in my opinion.
It's a problem I run into with my 350h. I go back and forth to work (4 miles) and it will only get 25-28 mpg. It warms up 1-2 miles in, but those first couple of cold miles are 15-20 mpg, followed by a couple of warm 35-37 mpg miles.
Most cars are rated city/highway. Hybrids should be rated cold/hot in my opinion.
Intermediate
Joined: Feb 2022
Posts: 286
Likes: 147
From: AR
Pole Position
Joined: Oct 2002
Posts: 3,067
Likes: 457
From: Pennsylvania
Well I'm right there with you. I filled up today with 397 miles on the trip odo and it took 12.13 gallons to fill it up. Math tells us that is 32.7 MPG. Also a combo of city/highway driving, but probably only 20% highway. Now granted, I know I'm driving a 5700 pound car that is 192 inches long. That kind of MPG on a car that big was unheard of for most of my life. But Lexus claims I should be getting 34 to 37. And I read posts on here of folks getting several miles per gallon more than I am. I am taking the car in next week to have it serviced with only 1055 miles on the odo. I'll ask them what they think about it.
What’s the frustration? And it should get better after break in.
Intermediate
Joined: Feb 2022
Posts: 286
Likes: 147
From: AR
