RX - 3rd Gen (2010-2015) Discussion topics related to the 2010 - 2015 RX350 and RX450H models

The 3RX Gas Mileage Thread

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Old 11-20-17, 08:19 AM
  #796  
jfarhat87
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Originally Posted by erom43
I have found the computer to be very accurate on my 2013 RX. However, make sure you are looking at the "milage after fill up", and not the "average". I don't know where the "average" figure comes from, but it has never given any significant data for me the entire time I have owned the car. The "milage after fill up", on the other hand, seems to be very accurate, and also resets itself automatically after each fill up.
That being said, 12-13 mpg seems low, but could be correct if you do a lot of local, and stop and go driving, or are on the gas and brake pedals alot. I normally get 15-18 mpg local, and 23+ mpg on the interstates, but have gotten as low as 14 mpg local.
Yes im talking about ''after fill up'' that is 12-13 mpg.
last year i bought a venza v6 and the computer never went lower then 18-20 mpg. Both car are 90% city driven.
Old 11-23-17, 09:32 PM
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PGAWest
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I am surprised by the variance in mpg owners have experienced. My 2010 RX350 FWD now has 95,xxx miles and I’ve seen a low of 20.1 in the winter to a high of 25.0.
Old 11-24-17, 02:05 PM
  #798  
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Originally Posted by PGAWest
I am surprised by the variance in mpg owners have experienced. My 2010 RX350 FWD now has 95,xxx miles and I’ve seen a low of 20.1 in the winter to a high of 25.0.
I owned my 2014 RX350 AWD for a year and a half while living in a small city in rural WI and there I averaged 23mpg (Highest 28.3, Lowest 20.1). I moved to a larger city in Florida where traffic is nuts, especially during snowbird season, and the stoplights seem to be stuck on red. I now average 19.0 (Highest 24.1, Lowest 17.7)

So the vehicle is the same and my driving style is also the same but the driving environment now encompasses a lot more stop and go. I dropped 4 mpg just by being in this environment. That said, everything is close to where I live here in Florida, so I don't put many miles on the vehicle and thus don't give a whit about gas milage.

Of interest is also the gas mileage variance based on city/highway driving. On average I get around 18-19 mpg when 100% city driving and 25-26 mpg when 100% highway driving.

So it is not surprising to me that this vehicle would only deliver 9-10 mpg in a larger city, in the winter months, with lots of stop and go driving especially if there is hilly terrain involved.
Old 12-17-17, 12:40 PM
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Rowder
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Originally Posted by jfarhat87
I have been reading the fuel and mpg thread and i have some questions. How accurate is the odo computer ?
My mpg are nowhere like other rx driver.
My computer is alway showing 18-19 L/100 km so this is 12-13 mpg which is very low IMO.
is there anyway to reset it ? I cant imagine what will be my mileage in winter lol.
I'm in Ottawa and I get around 13.1 to 14.8 L/100 km this time of the year (city and rush hour traffic).
My best is 9.3 L/100 km (highway, trip at 120 Km/hr)

Rog
Old 12-17-17, 02:02 PM
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jfarhat87
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Originally Posted by Rowder
I'm in Ottawa and I get around 13.1 to 14.8 L/100 km this time of the year (city and rush hour traffic).
My best is 9.3 L/100 km (highway, trip at 120 Km/hr)

Rog
ok there is obviously something wrong with my car. Are these from your own calculation or the dash computer number. This last week i was geting 24-25 L/100km
Old 12-18-17, 08:02 AM
  #801  
Rowder
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Originally Posted by jfarhat87
ok there is obviously something wrong with my car. Are these from your own calculation or the dash computer number. This last week i was geting 24-25 L/100km
Dash computer and my own - I use an App on my phone to monitor gas mileage, expenses, etc.
24 is really bad.... I'd get it checked.
Old 01-23-18, 01:18 PM
  #802  
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Just bought a 2012 RX 350 AWD and so far my MPG has been 20-23 with about 20% city and 80% highway. This is figured the old fashion way miles from fill up to fill up and the actual gallons. I don't consider that terrible, but my 2005 GX470 used less gas following the RX on the same 200 mile trip home after I bought it. Since that time (about 600-800 miles) I find the GX and RX almost the same for the miles we put on. I would have thought the RX would be much better. The GX rides better so if this keeps up I might just sell the RX and buy another GX
Old 01-24-18, 06:54 AM
  #803  
davrober
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My avg is 17 , thats total for everything since new. 70k miles. so far, summer gets up to 17.5 or so and winter goes down about 1mpg. I live 60 miles east off NYC on Long Island where its no where near city type driving.Its the only thing about the car I don't like. Tires are always inflated correctly and it gets its 5km service at Lexus always. The injectors are noisy like tappets when valves go but they tell me its normal. My neighbors 2010 is quiet yet my daughter in laws 2013 rx is noisy like mine. They both do better mpg than me..
Old 01-29-18, 04:22 AM
  #804  
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Default Bad MPG

Originally Posted by davrober
My avg is 17 , thats total for everything since new. 70k miles. so far, summer gets up to 17.5 or so and winter goes down about 1mpg. I live 60 miles east off NYC on Long Island where its no where near city type driving.Its the only thing about the car I don't like. Tires are always inflated correctly and it gets its 5km service at Lexus always. The injectors are noisy like tappets when valves go but they tell me its normal. My neighbors 2010 is quiet yet my daughter in laws 2013 rx is noisy like mine. They both do better mpg than me..
My new 2013 AWD was horrid. Summer or winter. Summer about 15-16. Winter -- just cold,bare pavement---about 12. That's the high side. Worst car I ever had for MPG. Dumped that car after less than two years. Bought a new 2015 RX hybrid. MPG was great. Loved the car totally. Wanted to buy at end of lease and they were ridiculous in what they wanted in terms and extended warranties. So much down, lousy interest rate,outrageous ext. warranty and a whole bunch of extra fee's. To bad because I wanted to buy it. Only had 12 k on it.
Old 01-29-18, 11:57 AM
  #805  
davrober
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Yeah that would have been sweet. I liked the Hybrid, it was the cost though. We actually were on the way to NJ about 2hour drive to look at one in stock but I stopped at the local Lexus here and bought this or rather the wife did lol.
Old 01-29-18, 06:14 PM
  #806  
rrichard7
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We have a 2011 RX350 AWD. We have had it since August 2014. I rarely drive the car, wife’s car. I recently drove 200 highway miles and got 21.5mpg. Regular gas and doing the math (not trip computer). I expected better but..... Oh, I didn’t exceed 75 mph.
Old 01-29-18, 06:30 PM
  #807  
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my rx is great highway straight set speed , 23 mpg get local even rural local and its 17
Old 03-08-18, 06:33 PM
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jfarhat87
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Last week did a 450 km trip and i was able to get 25.5 mpg with my 2010 rx350 using 87 octane. i could not believe it lol
Usually my city mpg is 14-15 mpg using 91 octane
Old 03-14-18, 06:21 AM
  #809  
KBRX350
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I have an 2007 RX 350 and getting 23.5 mpg using 93 octane. Also, I have 2012 RX 350 getting 21.4 mpg 93 octane. If I put regular in the 2012 which is recommended by the manufacture I will get 17-18 mpg. That is a big different between 87 regular and 93 octane. That is almost 65 mile different. So I stick to 93 octane cost a little more but I prefer to get the mpg
Old 03-14-18, 05:45 PM
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Originally Posted by jfarhat87
Last week did a 450 km trip and i was able to get 25.5 mpg with my 2010 rx350 using 87 octane. i could not believe it lol
Usually my city mpg is 14-15 mpg using 91 octane
Do they use imperial gallons in Quebec? If they do then your milage would be 21.25 mpg USA.


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