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Lexus RX 350 Real World MPG

36 messages,  Last post on Oct 12, 2009 at 1:42 PM

You are in the Lexus RX 300/330/350 Forum. Your Hosts are steve_ & tidester

What is this discussion about? Lexus RX 330, Fuel Efficiency (MPG), SUV


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#17 of 36
mileage by jthoeft
Aug 25, 2006 (5:41 am)
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As I posted earlier, I've been getting 30 MPG on exclusive highway driving (70MPH on speed control) per the vehicle computer. When I look at overall mileage, with 70-80% highway, 20-30% city, I net out to 24 or 25 MPG. I'm pretty surprised that some are only getting 12 in the city and think it has to be how one drives. The RX 350 can really take off, but that has to eat into mileage. I get the best city mileage when I keep the RPMS below 2500, even when starting out from a stop light. It isn't as slow a take off as it might seem. On the highway I use the cruise control all the time. I also try to coast into stop lights as much as possible--I paid for the car's momentum, why waste it away as heat by braking if it can be used by coasting. It's kind of a game for me. I haven't looked at tire pressure since driving off the lot --4000 miles now.
#18 of 36
Re: mileage [jthoeft] by 831cruzer
Aug 25, 2006 (2:35 pm)
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Replying to: jthoeft (Aug 25, 2006 5:41 am)

I have 5K miles on a AWD. I drive about 70% freeway, 30% city with a daily commute over an 1800 ft mtn pass. The vehicle computer is consistent at 22-23mpg. My manual calculations average about 21-22 mpg. I use premium, have not experimented yet with regular gas. The car has plenty of power over the mountain to pass the slow trucks. I have had the car for 3 months with air conditioner running almost the entire summer.
#19 of 36
Re: mileage [jthoeft] by maximafan
Aug 25, 2006 (9:15 pm)
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Replying to: jthoeft (Aug 25, 2006 5:41 am)

jthoeft, I read with interest about your mpg
ratings and how you get the use of the power
out of your RX. I've had mine for a week and
I'm still trying to adjust to the action of the
accelerator pedal. I'm coming from a Nissan
Maxima in which it feels as though I didn't
have to press as far down on the accelerator
to have good pick up and go. For instance,
at the stoplight, with the RX, while I know
there's power under the hood, it feels like
I have to push down pretty far on the pedal
to take off at a good clip, thus I'm rarely
able to shoot off as quick as I could in the
Maxima.
Any tips for a smooth and quick take off in
the RX, or do I just need time to adapt to a
slightly different feel on the accelerator
pedal? Or is it just the weight issue of the
RX certainly being heavier than a Maxima(mine was a 2002) or similar car?
 
P.S. I need to think of a different screen
name pretty soon!
#20 of 36
Re: mileage [maximafan] by jthoeft
Aug 26, 2006 (6:07 pm)
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Replying to: maximafan (Aug 25, 2006 9:15 pm)

My other car is a Boxster. I had just the opposite problem adjusting to the RX. The Boxster (mines a Tiptronic) has lots of peddle travel to get to the action, I feel the RX is very sensitive by comparison. I've squeeked the tires of the RX a few times when in a hurry to get out of someone's way. I really think it's just a matter of becoming used to the car. When I'm trying to drive for mileage, I am very gentle on the accelerator. A couple of more details about my mileage experience. The highway driving I've been describing is almost totally flat. I've been driving on cruise control; I'm using regular gas and the AC is on (we've had 41 days over 100 in Dallas this summer). By the way,is anyone kind of disappointed with the AC system? It seems to have to blow hard all the time and I don't feel it does a good job of keeping that big dash area cool. It's probably just the prolonged heat this summer.
#21 of 36
Re: mileage [jthoeft] by maximafan
Aug 26, 2006 (8:51 pm)
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Replying to: jthoeft (Aug 26, 2006 6:07 pm)

So far, my experience with the AC has been
positive. As a matter of fact, it seems to
get too cold too quick! And I've got the black
interior and I live in Florida! I have noticed
that even though the car has sat in the garage
overnight, when I first start it up and turn
on the AC, it still blows on the high setting
and I usually have to put it to the lowest
fan setting pretty quickly.
 
The mpg indicator still fluctuates quite a bit right now, so I'm not sure how I'm doing with the gas mileage. All I can say is on my first week with the RX, I've gone approximately 252 miles with about 20 miles remaining(according to the cruising range indicator) of gas.
 
I've got to say I'm very impressed with how
this SUV rides. It truly is just like a car.
It's smooth, quiet, and even in curves and turns there's hardly a hint of any lean or body roll. Everything is so well executed inside and out on this car. Lexus really knows their stuff.
Oh, and the service at Lexus is A-plus!!!
#22 of 36
Re: mileage [jthoeft] by mss443
Aug 29, 2006 (10:10 am)
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Replying to: jthoeft (Aug 26, 2006 6:07 pm)

I have a little more than 2500 miles on my RX350. With full A/C and using the mid grade gasoline (89 octane rating), I consistently get 26 miles and without A/C I get about 2.5 MPG. With 91 Octane, I got about a mile more than the above. The figures are based on a round trip of a total of 450 miles on the same day in I-80 (NJ-Pa.) (i.e., the route was not a flat one.) [I did not have to fill up the tank in between – NJ is a mandatory full service state and the gas is cheaper in NJ than in Pa.] For most part, the car was on cruise control at 69-70 MPH. Except for a couple of toll stops, the car was on full cruise throughout the trip. The usage information on the vehicle computer does not appear to be reliable – the vehicle computer indicated about 1.5 to 2.0 MPH higher than what was really achievable. In the combined city/highway driving, I get anywhere between 18 to 21 MPH depending on the drive segments. I am reasonably happy with the gas mileage I am getting from this car. To this date, not a single problem that I could think of.
#23 of 36
Mileage by davesuv
Oct 04, 2006 (7:20 pm)
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Our RX350 AWD has about 7000 miles. Around town with all city driving we usually get between 18 and 19 mpg. With a light foot, you can stretch this to almost 20. We just came back from a trip. On expressway, we were getting 29 to 30 at 65 mph. (Highest sustained mpg on the computer was 30.6). At 70 mph, we got 28.5 to 29. Always use 89 octane fuel.
 
Have not done any real world calculations yet. All above mpg are from the trip computer with the Nav system.
#24 of 36
Re: Lexus RX 350: Real World MPG [steve_] by md_outback
Oct 24, 2006 (3:45 pm)
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Replying to: steve_ (Jun 16, 2006 7:08 pm)

Update at 5000 miles: Overall average has been 20.5 mpg. During typical daily 18 mile commute of 60% highway and 40% local roads or jammed highways, I get very close to that overall average. On longer, highway-only trips (typically avg 70 mph), I get 24 to 25 mpg. Just around town brings mileage down very quickly to around 17-18 mpg. This data is based upon manual calculations after fuel fill-ups. Computer reading (with Nav system) is pessimistic up to 20 mpg (true mileage is better than computer), but then the computer is optimistic above a reading of 22 mpg (true mileage is lower than computer). Just drove another RX350 as a loaner during service call and that vehicle had a wildly optimistic computer reading of nearly 28 mpg for mixed driving. So don't always believe the on board computer - measure it yourself after each fuel stop. After using all grades of gasoline I have settled with 89 octane mid-grade as the best compromise, getting slightly better mpg than with 87 octane and with no noticeable difference in mpg or performance compared with premium. Great vehicle thus far!
 
MD
#25 of 36
Re: Lexus RX 350: Real World MPG [md_outback] by maximafan
Nov 01, 2006 (12:14 pm)
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Replying to: md_outback (Oct 24, 2006 3:45 pm)

In regard to the mpg on the trip computer, I
try to go by the the second number that says
"average", the one that doesn't jump up and down so easily. I took a trip from Tampa,FL
to Blairsville, GA this past week and my highway mileage averaged around 28 mpg. One time it even went up to 31 mpg for about five
minutes. I didn't expect to get as good of
gas mileage driving through the mountains.
I guess with all the coasting and usually going
at a speed less than 55 mph made a big difference. I was very pleased with the gas
mileage on this trip. Unfortunately, in-town
driving at home in the city goes down quite a bit.
 
Before I left for my trip I was averaging around 17.5 mpg's driving around town. As of
today, since I've been back, the computer has
dropped down to 24 mpg. I expect this to drop
some more as I get back into the routine of
driving around town.
#26 of 36
Re: Lexus RX 350: Real World MPG [maximafan] by wcclee
Nov 16, 2006 (12:10 pm)
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Replying to: maximafan (Nov 01, 2006 12:14 pm)

I've had my 350 for over 4 months now and get pretty close to the posted mpg ratings. For straight highway driving at ~70mph, I get 21mpg. The trip computer is consistently 0.5mpg more than what I calculate.
 
I don't see how people are getting 30mpg on the AWD model. At best, I will get 22mpg on flat highways with no traffic.

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