The 3RX Gas Mileage Thread
04-29-14, 12:00 PM
#406
They need to update the drivetrain. Most others (including some Toyotas) now utilize high pressure direct fuel injection which increases both power and fuel economy. And numerous other marques offer 8 speed transmissions now for more of those same two benefits. The top of the line Lexus drivetrain is becoming outdated.
05-01-14, 07:42 AM
#407
Intermediate
After 6 months of owning our RX350 our average over that time is 18.2 mpg with a lot of short trip city driving. Much better than our 2002 Highlander that we traded in for the RX. We are planning a 3000+ mile trip in June so more highway miles are ahead. The best single tank MPG is 22.8.
05-05-14, 05:50 AM
#408
Driver School Candidate
Join Date: Dec 2013
Location: NH
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
Things that effect gas mileage
I have a 2010 RX 350 that requires premium gas. I have never noticed any difference in performance or gas mileage between using regular or premium gas. Premium gas in New England averages >$.30-.$35 more per gallon. On a 14 gallon fill up, that is almost $5.00 more. or for me over $250 per year. I would rather spend my money on something else that actually has value. Living in NH I have learned that there is a winter formula for gas. This drops my mileage by about 2.5 mpg. They finally just switched over as my highway driving has gone up to 23.5 mpg this last week. I also found that using a premium name gas, such as Mobile or Exxon has more of an effect than using generic "Mr. Gas".
Another post mentioned another factor like wind, which makes total sense. If you ride a bike you know how much extra effort it takes to fight a head wind.
What disturbs me is how much false information the dealers are giving out. This falls in line with a general trending I have noticed, that if someone doesn't know the answer, they just make up something that sounds reasonable. At first I thought it was just my kids doing it, but now I find it is everywhere. I wonder how much knowledge these service advisors actually have on thing effecting gas mileage.
Another post mentioned another factor like wind, which makes total sense. If you ride a bike you know how much extra effort it takes to fight a head wind.
What disturbs me is how much false information the dealers are giving out. This falls in line with a general trending I have noticed, that if someone doesn't know the answer, they just make up something that sounds reasonable. At first I thought it was just my kids doing it, but now I find it is everywhere. I wonder how much knowledge these service advisors actually have on thing effecting gas mileage.
05-18-14, 01:59 PM
#411
Intermediate
I thought this was interesting:
https://www.fuelly.com/car/lexus/rx350
If the link does not work (you may need to be logged in) then here is the start of the graphic, a summary of all RX350s being recorded on the site and then by year:
https://www.fuelly.com/car/lexus/rx350
If the link does not work (you may need to be logged in) then here is the start of the graphic, a summary of all RX350s being recorded on the site and then by year:
05-28-14, 03:08 PM
#412
Rookie
Join Date: Apr 2014
Location: CA
Posts: 51
Likes: 0
Received 0 Likes
on
0 Posts
my MPG
Hope you all are enjoying with your RX 
I always had this habit to control my MPG, specially when I refuel I do my calculations
Its been a month Im driving my new RX & I feel its getting better & better now. Its like improving itself...
My average usage AFTER REFUEL was between 16-17 but now after a month its between 19-20.
Do you have the same experience?
What do you think?
- Is it because of improving? or
- My driving skill is matching to RX now? or
- Is car increasing the performance because of driving? like warming up? or
- Is it RANDOM?
keep in mind I use the same street & freeway to go to work & return home...
I always had this habit to control my MPG, specially when I refuel I do my calculations
Its been a month Im driving my new RX & I feel its getting better & better now. Its like improving itself...
My average usage AFTER REFUEL was between 16-17 but now after a month its between 19-20.
Do you have the same experience?
What do you think?
- Is it because of improving? or
- My driving skill is matching to RX now? or
- Is car increasing the performance because of driving? like warming up? or
- Is it RANDOM?
keep in mind I use the same street & freeway to go to work & return home...
05-28-14, 03:26 PM
#413
Lexus Champion
Just completed our first (fairly short) road trip over the Memorial Day weekend. Trip was 110 miles each way, or 2 hours there, 3 on the way back (traffic). We drove over the mountain pass each way (elevation 4061 feet, our house is at sea level). My average, despite the pass and traffic, was 23.4 mpg, and I am very happy with that. We also had it pretty loaded down with gear.
I was at 23.8 mpg until we started climbing the pass. By the time I got to the top, we were at 19.4, but got back into the 23 range again after coasting down the other side.
Our RX was incredible on the trip. So smooth and comfortable. Dang I love that thing.
I was at 23.8 mpg until we started climbing the pass. By the time I got to the top, we were at 19.4, but got back into the 23 range again after coasting down the other side.
Our RX was incredible on the trip. So smooth and comfortable. Dang I love that thing.
05-28-14, 03:41 PM
#415
Lexus Champion
06-02-14, 04:45 AM
#416
Driver School Candidate
Join Date: Jun 2014
Location: New York
Posts: 43
Likes: 0
Received 0 Likes
on
0 Posts
Just completed our first (fairly short) road trip over the Memorial Day weekend. Trip was 110 miles each way, or 2 hours there, 3 on the way back (traffic). We drove over the mountain pass each way (elevation 4061 feet, our house is at sea level). My average, despite the pass and traffic, was 23.4 mpg, and I am very happy with that. We also had it pretty loaded down with gear.
I was at 23.8 mpg until we started climbing the pass. By the time I got to the top, we were at 19.4, but got back into the 23 range again after coasting down the other side.
Our RX was incredible on the trip. So smooth and comfortable. Dang I love that thing.
I was at 23.8 mpg until we started climbing the pass. By the time I got to the top, we were at 19.4, but got back into the 23 range again after coasting down the other side.
Our RX was incredible on the trip. So smooth and comfortable. Dang I love that thing.
06-02-14, 01:40 PM
#417
Rookie
Join Date: Nov 2013
Location: IN
Posts: 89
Likes: 0
Received 0 Likes
on
0 Posts
I thought this was interesting:
https://www.fuelly.com/car/lexus/rx350
If the link does not work (you may need to be logged in) then here is the start of the graphic, a summary of all RX350s being recorded on the site and then by year:
https://www.fuelly.com/car/lexus/rx350
If the link does not work (you may need to be logged in) then here is the start of the graphic, a summary of all RX350s being recorded on the site and then by year:
06-02-14, 01:45 PM
#418
Rookie
Join Date: Nov 2013
Location: IN
Posts: 89
Likes: 0
Received 0 Likes
on
0 Posts
Ouch is right. With gas prices hovering around $4 in my area, that kind of mileage would **** me off.
06-02-14, 03:34 PM
#419
06-09-14, 04:25 AM
#420
Driver School Candidate
Join Date: Dec 2013
Location: NH
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
no increase in MPG with premium
I have tried using premium gas in my 2010 RX 350, where it is recommended. I have never seen
any difference in MPG. I ran the tank almost empty a few times and filled with 92 octane paying $.30 more per gallon with no increase in gas mileage. On the highway I can get up to 24.5 MPG if I keep my speed below 70 MPH. If I increase to 75MPH my mileage drops to 23 or 22 MPG. City or mixed driving and I will see my MPG go as low as 16-17 MPG. I just bought my wife a Hyundai Tuscon.
The same driving and she will get 29-30 MPG highway and 25 MPG city. And... wait for it...
The Hyundai has a better ride. Since I drive over 24,000 miles per year that type of gas mileage would represent a savings of over $1,000 per year. ??? Something I am wrestling with, as I am disappointed in the MPG with the RX. And if I used the premium, as recommended, it would be a
deciding factor. Thankfully, I have seen no difference in performance or milage paying the extra cost.
The car is nice, but $1,000 per year is real money, not just pennies. Anyone considering a RX should take a close look at the Hyundai Tuscon Limited. You could buy 2 of them for the price of 1 RX and save real money as gas. And trust me you will not be disappointed.
any difference in MPG. I ran the tank almost empty a few times and filled with 92 octane paying $.30 more per gallon with no increase in gas mileage. On the highway I can get up to 24.5 MPG if I keep my speed below 70 MPH. If I increase to 75MPH my mileage drops to 23 or 22 MPG. City or mixed driving and I will see my MPG go as low as 16-17 MPG. I just bought my wife a Hyundai Tuscon.
The same driving and she will get 29-30 MPG highway and 25 MPG city. And... wait for it...
The Hyundai has a better ride. Since I drive over 24,000 miles per year that type of gas mileage would represent a savings of over $1,000 per year. ??? Something I am wrestling with, as I am disappointed in the MPG with the RX. And if I used the premium, as recommended, it would be a
deciding factor. Thankfully, I have seen no difference in performance or milage paying the extra cost.
The car is nice, but $1,000 per year is real money, not just pennies. Anyone considering a RX should take a close look at the Hyundai Tuscon Limited. You could buy 2 of them for the price of 1 RX and save real money as gas. And trust me you will not be disappointed.