The 3RX Gas Mileage Thread
#541
Lexus Champion
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I've tried regular, mid-grade, and premium gasolines in our 2015 RX450h and I still only get 23.3 MPG.This unit has almost 6K miles on it already.
Not only that, the monitor reads the same (23.3 MPG) regardless of in-city driving or highway driving. Any of you all have similar results?
Not only that, the monitor reads the same (23.3 MPG) regardless of in-city driving or highway driving. Any of you all have similar results?
go by the mpg after re fueling, much more accurate. or reset the regular mpg read out ounce in a while. also i have noted a 1 mpg + difference on 89 octane over regular fuel. and the motor pulls better and the trans doesn't hunt for gears near as much either. overall a better smoother driving experience over the regular.
#542
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I've tried regular, mid-grade, and premium gasolines in our 2015 RX450h and I still only get 23.3 MPG.This unit has almost 6K miles on it already.
Not only that, the monitor reads the same (23.3 MPG) regardless of in-city driving or highway driving. Any of you all have similar results?
Not only that, the monitor reads the same (23.3 MPG) regardless of in-city driving or highway driving. Any of you all have similar results?
#543
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I just drove my 2013 RX350 AWD from Indianapolis to Orlando and back. I got 22.7 mpg (95% Interstate).
#544
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Looks like I need to make this same trip a three more times in the next few months so I'm anxious to see what the fuel economy is with no winter blend gas and warmer weather. Overall, I've been relatively satisfied with the expressway fuel economy of the Lexus RX. Driving around Cape Coral and Fort Myers the fuel economy dropped to 21.7 MPG. I can't believe how long the stoplights take to cycle here in FL. Seems if you are stopped at a red light it stays red for 4-5 minutes. Can't believe how many drivers run red lights here.
#545
Lexus Champion
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I used to always check my gas mileage by computing it out, but every time I have, it's within .1 mpg of the dash readout so I don't bother anymore.
On our 2013 RX350 with 15k miles, we're averaging 21.7.
On our 2013 RX350 with 15k miles, we're averaging 21.7.
#546
Driver School Candidate
Join Date: Feb 2015
Location: IL
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I purchased my 2015 RX 350 in July 2014 and it has about 3000 miles on it. I recently noticed that the gas mileage is VERY low, around 13 mpg. It is rated at 18 mpg City/25 Hwy for combined 21 mpg. I know there's fudge room in testing but mine doesn't even seem to be in the realm of the margin of error. When I have a completely full tank, the readout says 249 miles to the tank (19 gallons), and I don't even get that much. I admittedly do more city driving than Hwy. Per the manual, I'm using 87 octane gas, and can't imagine (but am ready to stand corrected) that using 89 or 91 would account for a full 5 mpg difference. I am not a jackrabbit starter and can't speed much in the city. I had a 2007 RX 350 that got way better mileage (17 at its worse) in identical driving conditions. My mom got her identical 2015 RX 350 at the same time and in her city, she gets 19-20 mpg, and much higher on the highway.
Seems to me that 13 is very low, no matter what kind of gas I'm using, the cold climate I'm in, and even if I was doing 100% city driving (though it's more like 70%). Any thoughts on whether there might be a problem that I should have addressed? Thanks.
Seems to me that 13 is very low, no matter what kind of gas I'm using, the cold climate I'm in, and even if I was doing 100% city driving (though it's more like 70%). Any thoughts on whether there might be a problem that I should have addressed? Thanks.
#548
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I've had my 2015 RX 350 for a month with 3 or 4 fill-ups. I'm getting about 16 mpg around town. On one trip which was highway/freeway for half a tank I got 24 mpg (according to the readout on the car). My previous vehicle, a 2008 Hyundai Santa Fe with the 3.3 liter V6 consistently got 18mpg in the city and 24-25 highway, exactly what it was rated at. Hopefully my in-town mpg will get a little better with the new RX.
#549
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I purchased my 2015 RX 350 in July 2014 and it has about 3000 miles on it. I recently noticed that the gas mileage is VERY low, around 13 mpg. It is rated at 18 mpg City/25 Hwy for combined 21 mpg. I know there's fudge room in testing but mine doesn't even seem to be in the realm of the margin of error. When I have a completely full tank, the readout says 249 miles to the tank (19 gallons), and I don't even get that much. I admittedly do more city driving than Hwy. Per the manual, I'm using 87 octane gas, and can't imagine (but am ready to stand corrected) that using 89 or 91 would account for a full 5 mpg difference. I am not a jackrabbit starter and can't speed much in the city. I had a 2007 RX 350 that got way better mileage (17 at its worse) in identical driving conditions. My mom got her identical 2015 RX 350 at the same time and in her city, she gets 19-20 mpg, and much higher on the highway.
Seems to me that 13 is very low, no matter what kind of gas I'm using, the cold climate I'm in, and even if I was doing 100% city driving (though it's more like 70%). Any thoughts on whether there might be a problem that I should have addressed? Thanks.
Seems to me that 13 is very low, no matter what kind of gas I'm using, the cold climate I'm in, and even if I was doing 100% city driving (though it's more like 70%). Any thoughts on whether there might be a problem that I should have addressed? Thanks.
#550
No, I don't play soccer!
![](https://www.clublexus.com/forums/images/ranks/rank-mod2.gif)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Welcome to CL, kross871. There are a few things to consider regarding your low mileage. First would be the cold weather combined with the winter fuel blend. Neither helps mileage at all. You're also within the 5,000 mile break-in period. Your mileage will increase as the temperature and odometer climbs. Give it more time. And be sure to check out the 3RX mileage thread .
#551
Driver School Candidate
Join Date: Feb 2015
Location: IL
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Thanks for the responses. I know the cold affects things, but didn't think it could account for such a low number. I drove my '07 for 7 years in the same climate and never got such low mileage, even in the early months or in its later years (and always used 87 octane, even though back then it wasn't recommended for the RX's like it is today). At the rate I drive, the car will be nearly a year old for me to get through a 5000 mi "break in" period. The dealer agrees 13 is too low but mechanics can't find anything wrong re codes. Just don't know what to do at this point.
#553
Lead Lap
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
City driving & local landscape can play immensely into realized MPG. Driving on flat terrain, similar to what I see in sunny Florida, is quite different than our city with many, many hills & the extreme cold.
That said, my F150 4X4 truck with a 5.4l auto averages 15-16 MPG year round. I can approach 19.5 - 20 MPG on the highway if I stay at or just below the limit. Problem is I rarely stick to the limit .
-35 C here tonight with another blizzard due in Sunday.Should see another 30"-35" snowfall.
Gotta live here to get it!
That said, my F150 4X4 truck with a 5.4l auto averages 15-16 MPG year round. I can approach 19.5 - 20 MPG on the highway if I stay at or just below the limit. Problem is I rarely stick to the limit .
-35 C here tonight with another blizzard due in Sunday.Should see another 30"-35" snowfall.
Gotta live here to get it!
#554
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
My 2014 RX AWD picked up a couple MPG right around 6,000 miles. Winter blend fuel dropped my fuel economy by 2-3 MPG. I'd still refer this to Lexus on your next service call to get your dissatisfaction on record. If the fuel efficiency doesn't improve there may well be something wrong. 13 MPG is disappointing for sure but I'd venture that when they test for the EPA figures it is not done with winter blend fuel and likely done under optimal weather conditions, not temps in the teens.
My measured fuel economy so far 100% City: 20.5, 100% Highway: 25.3, Average over 16 month: 23.9
My measured fuel economy so far 100% City: 20.5, 100% Highway: 25.3, Average over 16 month: 23.9
#555
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
kross871
My wife has a 2013 RX 350 AWD with 19 inch wheels. It only has 2985 miles. I am keeping fuel mileage records (since new) by hand calculation (as opposed to using the trip computer). In all city driving it gets 15.5 mpg. On two all highway trips of 600 miles round trip each, it got 21.2 mpg. On the highway I usually run about 80 mph. In town it is under 45 mph stop and go. Living in AZ the cold temps are not a factor. The place where I refuel is a Chevron that does not use winter blend and I have always used 87 octane. Just wanted to give you something else to compare to.
My wife has a 2013 RX 350 AWD with 19 inch wheels. It only has 2985 miles. I am keeping fuel mileage records (since new) by hand calculation (as opposed to using the trip computer). In all city driving it gets 15.5 mpg. On two all highway trips of 600 miles round trip each, it got 21.2 mpg. On the highway I usually run about 80 mph. In town it is under 45 mph stop and go. Living in AZ the cold temps are not a factor. The place where I refuel is a Chevron that does not use winter blend and I have always used 87 octane. Just wanted to give you something else to compare to.