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Realistic MPG?

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Old 05-21-15, 01:51 PM
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jasone36
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Exclamation Realistic MPG?

Hello,

I am considering the 2010 Lexus GX460. I love Lexus, but my concern is the gas mileage (MPGs).

I currently drive a 2002 Lexus SC430 coupe/convertible, which is a 4.3L V8 engine, and my gauge reads 16 MPG on average (I do nearly all city driving). What can I expect with the GX?

Can anyone please post realistic MPG numbers from their GX460?

Perhaps you can take a picture of the gauge with your phone, for authenticity?

Thanks in advance!
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Old 05-21-15, 03:10 PM
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fortytwo
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MPG is not it's strong point. With 93 octane gas, I get right at 12mpg on my '15 GX460, city & burb driving in Austin, TX (some hills in the burbs).
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Old 05-21-15, 04:21 PM
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Craig B
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I average 14-16 MPG in city driving. In the winter when it gets cold and have snow on the ground, it's gone down to 12-13 MPG. I would say, I get 15 MPG average in city driving with 93 octane Mobil premium fuel. I get the same MPG in my 2014 as I did in my 2010 GX 460. Good luck with your decision.
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Old 05-21-15, 05:53 PM
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I also get around 12-14 mpg...sucks. GX is still a great car though..
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Old 05-21-15, 07:35 PM
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I'm averaging 15.5 MPG overall mixed driving. I have gotten as high as 21 MPG on all highway driving.
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Old 05-23-15, 07:10 AM
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17.5 MPG on premium, half city, half freeway.
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Old 05-23-15, 06:05 PM
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Default gas mileage

Hmmmm. I consistently get 19.3 mpg - driving in the mountains of Colorado.

The GX gets much better highway mileage. If you're trying to save gas, driving around the city isn't the thing to do.
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Old 06-28-15, 06:54 PM
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Default Premium fuel?

I just picked up my GX three days ago. Haven't filled it up yet. Is it really necessary to use premium? Or will regular unleaded do the job?
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Old 06-29-15, 06:24 AM
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Originally Posted by SUVISME View Post
I just picked up my GX three days ago. Haven't filled it up yet. Is it really necessary to use premium? Or will regular unleaded do the job?
You will get a lot of opinions here and my opinion is no, it is NOT necessary but with that being said the engine and computer were designed to run the GX most efficiently on Premium. The computer will adjust the engine to run on regular with no issues but you will be losing power and efficiency. We have been running regular in our company S550's for years, 3 yr 25k lease, on our 6th one, they have never ran premium, always regular and they run just fine.

Just my .02 .
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Old 06-29-15, 10:37 AM
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Update: Decided to pursue an RX350 instead of a GX460.

I test drove a GX460 at a dealership (it was brand new, under 10 miles on it). I took a 6 mile test drive, drove very conservatively, and the MPG gauge showed 9.9 MPG (I'm assuming they ran premium fuel).

The car looks great, much better than the RX350 in my opinion, but it just doesn't fit my specific purpose, and the low MPG sealed the deal.
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Old 06-29-15, 11:03 AM
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Originally Posted by jasone36 View Post
Update: Decided to pursue an RX350 instead of a GX460.

I test drove a GX460 at a dealership (it was brand new, under 10 miles on it). I took a 6 mile test drive, drove very conservatively, and the MPG gauge showed 9.9 MPG (I'm assuming they ran premium fuel).

The car looks great, much better than the RX350 in my opinion, but it just doesn't fit my specific purpose, and the low MPG sealed the deal.
Something is real wrong with that MPG, but you've go to do what's best for your situation.

Good Luck with the RX.
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Old 06-29-15, 12:50 PM
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Thanks Eppieguy - any other opinions on Premium vs Regular usage in your GX?
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Old 06-29-15, 05:40 PM
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Originally Posted by jasone36 View Post
Update: Decided to pursue an RX350 instead of a GX460.

I test drove a GX460 at a dealership (it was brand new, under 10 miles on it). I took a 6 mile test drive, drove very conservatively, and the MPG gauge showed 9.9 MPG (I'm assuming they ran premium fuel).

The car looks great, much better than the RX350 in my opinion, but it just doesn't fit my specific purpose, and the low MPG sealed the deal.
Break in needed for the true MPG? Under 10 miles on it... Any new owners here notice a change in MPG over time?
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Old 06-29-15, 06:37 PM
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Originally Posted by tecman View Post
Break in needed for the true MPG? Under 10 miles on it... Any new owners here notice a change in MPG over time?
It's probably still running the Japan gas and has had a ton of short trips, a lot of idling time and a ton of start ups. Need to run a full tank of gas in it to see real MPG's. Out of factory, to a staging lot, to a truck, off a truck to a stagunf lot, on to a ship, off a ship to a staging lot, on to a truck and off the truck to the dealers lot, no way to tell real MPG that way.
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Old 06-30-15, 01:31 AM
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2015 Premium pckg, use #93 Shell most of the time, 1546 miles now, 18.8 mpg. 70/30 highway / local.
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