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Lexus RX 350 Real World MPG

52 messages,  Last post on Sep 07, 2011 at 8:10 AM

You are in the Lexus RX 300/330/350 Forum.

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

Messages Page 2 of 6

#3 of 52 Re: Lexus RX 350: Real World MPG [beemertime] by rcf8000

Jun 17, 2006 (8:33 am)

Replying to: beemertime (Jun 16, 2006 9:57 pm)
I'm getting about 21 mpg in city street/suburban road driving, and 24 mpg on interstate highways, driving mostly at 75 or 80 mph. The highway mileage is a bit lower than I was expecting. However, I have seen evidence that the highway mpg is significantly higher if I drive 65-70 mph. My RX350 is fwd, and it now has 3000 miles on it. I have manually calculated the mpg numbers, and compared them to the trip computer values. I have had 8 fill-ups so far, and in each case the trip computer gave higher mpg than the calculations, by as little as 0.3 mpg and as high as 0.9 mpg. The average discrepancy is 0.5 mpg.

#4 of 52 RX350 AWD by chea89

Jun 21, 2006 (6:18 am)

About 500 miles-all city driving-stoplight to stoplight--under 17 mpg, maybe should have gone for the 400h?

#5 of 52 Re: Lexus RX 350: Real World MPG [rcf8000] by beemertime

Jun 22, 2006 (12:08 pm)

Replying to: rcf8000 (Jun 17, 2006 8:33 am)
how did u calculate it using the trip reader on the RX? is there a feature onboard of the RX350 that does the calculation automatically?

#6 of 52 Re: Lexus RX 350: Real World MPG [beemertime] by rcf8000

Jun 22, 2006 (1:45 pm)

Replying to: beemertime (Jun 22, 2006 12:08 pm)
The trip information screen shows MPG since fill-up. Maybe the RX350s without NAV don't give this information, I don't know.

#7 of 52 re RX 350 Real World MPG by jthoeft

Jul 11, 2006 (1:28 pm)

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 52 Re: Lexus RX 350: Real World MPG [steve_] by md_outback

Jul 12, 2006 (5:06 pm)

Replying to: steve_ (Jun 16, 2006 8:08 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 52 New Engine by sorter

Jul 23, 2006 (1:47 pm)

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 52 Lexus RX330 Re-styling by bburmeister

Jul 24, 2006 (9:35 am)

Does anyone know if Lexus plans to re-design the RX330 and when?

#11 of 52 RX350 regular gas or >91? by lvn098

Aug 15, 2006 (3:04 pm)

Replying to: jthoeft (Jul 11, 2006 1:28 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 52 Re: RX350 regular gas or >91? [lvn098] by jthoeft

Aug 16, 2006 (11:25 am)

Replying to: lvn098 (Aug 15, 2006 3:04 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.

Messages Page 2 of 6

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