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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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#7 of 36
re RX 350 Real World MPG by jthoeft
Jul 11, 2006 (12:28 pm)
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I've had my RX 350 FWD for about a month-- about 2000 miles on it now. Each weekend we drive about 90 miles each way to our weekend place. It's four lane all the way; starting out on a busy interstate and then open country. Setting the cruise control on 72 mph and using regular gas I've been getting anywhere from 27 to 31 mpg for the 90 mile trip--according to the on board computer. This mileage drops off fast once I start driving around in town, but I'm really pleased with the car's highway mileage performance. We don't drive that much in town, so on an overall basis, city driving and the weekly trips to the lake, we've been getting overall mileage around 24-25 mpg.
#8 of 36
Re: Lexus RX 350: Real World MPG [steve_] by md_outback
Jul 12, 2006 (4:06 pm)
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Replying to: steve_ (Jun 16, 2006 7:08 pm)

Only have 1400 miles on my RX350 AWD and mileage is slowly improving. Averaged 18 mpg for first 500 miles, then up to 18.5 through 1000 miles, now about 20 mpg (real mileage calculations - not based on the computer, though that is pretty close). Have not taken any long trips, but I can average about 21 mpg during typical mixed city/highway drive to work if I keep speeds below 75 mph. Mileage drops quickly when I get more aggressive - which is often. Used premium (93 oct) for first 1000 miles, now alternating 93 and 89 octane to see if I notice a difference.
#9 of 36
New Engine by sorter
Jul 23, 2006 (12:47 pm)
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This new 350 engine supposed to be more powerful and yet have better mph than the RX300 or 330. My 2002 RX300 average 18.1-18.3 in winter, but summer I get 19.3 mpg. computer reading.
Driving mostly local freeway or local driving. Not city stop and go. I expected the 350 to be about 28 MPG for highway...
I think the Horse power for 300/330 is enough, Toyota should have keep same HP rating and enhance MPG more.
#10 of 36
Lexus RX330 Re-styling by bburmeister
Jul 24, 2006 (8:35 am)
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Does anyone know if Lexus plans to re-design the RX330 and when?
#11 of 36
RX350 regular gas or >91? by lvn098
Aug 15, 2006 (2:04 pm)
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Replying to: jthoeft (Jul 11, 2006 12:28 pm)

I just read the Owner Manual, 91 octan gas is required, but some people here are using regular gas.
 
What do you think? I hate to put in Premium if I can fill it up with regular.
#12 of 36
Re: RX350 regular gas or >91? [lvn098] by jthoeft
Aug 16, 2006 (10:25 am)
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Replying to: lvn098 (Aug 15, 2006 2:04 pm)

I've been using regular gas since I bought the car (it is now four months old and 3700 miles). It came with a full tank of gas which I imagine was premium. Since then I've used only regular i.e. 87 octane. I was assured by my dealer (Sewell in Dallas) that this would pose no problem for the engine and have no effect on the warranty, etc. They said it was up to me, depending on my driving style I might notice a reduction in performance. I've had no performance issues whatsoever.
 
I continue to get over 30 mpg, consistently when driving 70 mph on speed control using regular. This does not include any city driving.
 
I'd suggest you ask your dealer and see if you get the same answer.
#13 of 36
Re: RX350 regular gas or >91? [jthoeft] by maximafan
Aug 16, 2006 (8:29 pm)
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Replying to: jthoeft (Aug 16, 2006 10:25 am)

Wow! That's pretty awsome! That's even higher
than what the window sticker claims. I think
the sticker claims 20 in the city and 25
on the highway. I will be picking up my '07
Flint Mica RX350 tomorrow morning! I'm really
excited. I will be driving mostly in the city
though. But I look forward to my first road
trip in the RX which will probably be near the
end of October. I usually go up to the North
Georgia Mountains or North Carolina for fall
foliage season. Hope I get to see similar
mpg's such as yours.
 
P.S. I guess I'll be changing my Edmunds
screename soon.
#14 of 36
Re: RX350 regular gas or >91? [maximafan] by sxylxy
Aug 17, 2006 (8:39 am)
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Replying to: maximafan (Aug 16, 2006 8:29 pm)

I've used three tanks so far (including the 1st dealer tank which I assume was premium). I started out with 22 miles on the vehicle. I've been using premium gas. 90% around town with low but near-constant AC use. I got 12 MPG wtih the first tank and 12.8 MPG on my second tank. The third tank is running at 13.4 MPG and the NAV system reads about .4 higher MPG. I do spend more than a bit of time at stop lights, but wow! Much lower than expected. My tires are at 37...is that too low?
#15 of 36
Re: RX350 regular gas or >91? [sxylxy] by maximafan
Aug 17, 2006 (10:18 pm)
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Replying to: sxylxy (Aug 17, 2006 8:39 am)

I haven't had a chance to check the tire pressure requirements on the RX yet, but usually the normal pressure is 32 psi. If this
is what Lexus is recommending, you might be a
little over. I don't know if it's enough to
cause any problem, although it might affect
how smooth your ride might be. I know in my
2002 Maxima, if the tires were to get
over-inflated, I could definitely feel it in
the ride quality.
Usually, the psi requirement would be on the side of the driver's front door. I will be
checking this to see what the recommended amount is.
#16 of 36
Re: RX350 regular gas or >91? [maximafan] by sxylxy
Aug 18, 2006 (5:41 am)
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Replying to: maximafan (Aug 17, 2006 10:18 pm)

The inside of the door on the Lexus says 30 psi and the tires themselves say maximum 44 psi. Wide range! I'll go by 32 until I get a more difinitive answer from Lexus.

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