ggebhardt

“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.

aeromarkco

Seeing about 28 mpg at 90 mph on Interstates from driver display. About 31 mpg at 75 mph on US highways.

tedward155

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...

jahnjva

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.

tedward155

My calculations of 33 to 34.5 are based on 2 tank refills, since I've owned it, where I topped off the tank as full as possible to guarantee that I was as close as possible to comparing apples to apples. And, I divide my trip miles A&B by the gallons on my receipt. I know not to trust the readings on the car. I drive in ECO mostly and occasionally I even push the EV Mode button on the console. I run it until the battery shuts it down. I will have the dealer look at it when I take it in for 1,000 mile oil and filter change. In the end I will live with whatever it is. 33 MPG is not bad, it's just not what it should be.

Hefty

Driving conditions have a tremendous amount to do with this. During the winter in coastal NC, my average was 37-38. Now that I am in the mountains, it is 33-35. I don’t think 33-34 is bad at all.

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.

jglorioso

To get decent mileage from a hybrid, it needs to be warmed up. Four bars for the 350h on the engine temp. Even a cold Prius will get 19 mpg.

tedward155

Hmmm. Didn't know that.

daryll40

Is this really true? Source?

jglorioso

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.

krafty81

I am still frustrated with my overall MPG. Driving in ECO like a grandma. Still about 31 in 70% local and 30% highway driving. Tried both premium and regular gas.

tedward155

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.

daryll40

32.7 on a 34 MPG sticker estimate seems pretty good to me. Similar, but almost double, my old 2020RX with a 19 sticker that got 17.

What’s the frustration? And it should get better after break in.

tedward155

The frustration is Lexus claims I should get, on average, 36, not 34.

daryll40

94.4%. And it’s not broken in. 🤷🏻‍♂️