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Lexus GS 450h MPG-Real World Numbers

86 messages,  Last post on Sep 17, 2009 at 4:23 PM

You are in the Lexus GS 450h Forum. Your Host is pf_flyer

What is this discussion about? Lexus GS 450h, Fuel Efficiency (MPG), Sedan


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#17 of 86
How do you reset the Tank Average? by rcellio
Sep 10, 2006 (5:35 pm)
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I just got my GS 450h. It was used and had 2000 miles on it. If there was supposed to be a really thick owner's manual, then I don't have it. All I have are "Quick Guides". I can't find out how to reset the Tank Average in the display screen after putting in a full tank of gas. I thought that opening the fuel door would reset it, but it didn't. Is there something you have to do to reset it?
Thanks.
#18 of 86
Re: How do you reset the Tank Average? [rcellio] by idele
Sep 11, 2006 (6:46 am)
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Replying to: rcellio (Sep 10, 2006 5:35 pm)

The on screen average (this is the navigation screen; don't know if navigation is absent that it's present) is long term. It resets when you use reset button on screen. There is on dashboard (you have to get it by scrolling) a tank average which resets upon fillup automatically. Also on dashboard you can scroll to get graphic display of instantaneous mpg instead.
#19 of 86
Re: How do you reset the Tank Average? [idele] by rcellio
Sep 11, 2006 (7:47 am)
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Replying to: idele (Sep 11, 2006 6:46 am)

Thank you for that. I'll look for the instant mileage on the dash display. I believe my tank average is not working with the gas cap opening and closing. Did you get a thick owner's manual?
#20 of 86
Re: How do you reset the Tank Average? [rcellio] by flid
Sep 13, 2006 (11:07 am)
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Replying to: rcellio (Sep 11, 2006 7:47 am)

Yes, there is a standard set of owners manuals that are in a Lexus cover/binder that fits in the upper left area of the glove box. This is in addition to the "Quick Guides".
 
How did you end up with used one with 2,000 miles? Dissatisfied customer? I just got mine (have only just over 100 miles) and couldn't imagine giving it up...
#21 of 86
mpg data by idele
Sep 20, 2006 (6:51 am)
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The average mpg on the car (never reset) now stands at 27.9 after 2800 miles. It is slowly improving as the car breaks-in. The tank average mpg (a different readout which automatically resets upon fillup) stays above 28mpg which meams the total average mpg will move to 28mpg in a little while. The GS450h is such an excellent performer that the fuel efficiency is a very nice bonus.
#22 of 86
Re: mpg data [idele] by bmwconvert
Sep 20, 2006 (9:51 am)
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Replying to: idele (Sep 20, 2006 6:51 am)

Can you please describe your driving style and typical trips. Any tricks you use to boost results?
I am reasonably pleased with my mileage and have also seen about a 5% improvement since the car was new (I now have 4,200 miles), but I am not seeing results like you are.
My typical tank average is about 25mpg. I've gotten as high as 28mpg, but only when on a long highway trip driving ~70mph. I use 93 octane fuel, drive more city than highway, up/down some large hills during a mostly local roads daily commute and mixed driving on weekends. 90% of the time I'm not exploiting the car's performance, but rather am driving for maximum economy by coasting to red lights, not accelerating hard from a stop and trying to run as long on the electric motor as possible.
#23 of 86
Re: mpg data [bmwconvert] by alp8
Sep 20, 2006 (10:31 am)
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Replying to: bmwconvert (Sep 20, 2006 9:51 am)

I'm all for trying to maximize mpg, but I think it is naive to expect the 450H to get 30 mpg or upwards
 
cars like the 450H without a hybrid get, what?, maybe 16 mpg? The 450H ain't no Camry, if you get my point. To get this much performance and get 20 mpg is quite an achivement. Tons of people buy this much performance and get 15 mpg and are happy about that!!
#24 of 86
Re: mpg data [bmwconvert] by idele
Sep 20, 2006 (1:14 pm)
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Replying to: bmwconvert (Sep 20, 2006 9:51 am)

I had an RX400h for 11 months before trading for the GS450h. I only use premium gas. The kW meter teaches you that accelerating fast guzzles gas. So I do zoom on occasion but try to make the decision to do so rationally rather than stepping on the gas habitually. The long term average gas mileage on the RX400h was 27.3 mpg over 7400 miles when I traded it. On the RX400h coasting is bit easier than on the GS450h and urban mileage seems a bit better. But on the highway the GS excels, the main reason being the two stage reduction gear. If you get the GS over 55mph the cruising range kicks in automatically and stays in until you get down below 40mph. So I try to get into cruising range quickly. And I take somewahat longer routes that let me get that speed. Conversely at very low speeds one uses the battery power only and I try to use that too. I live in a hilly area, so coasting downhill when possible is standard.
The fuel savings by itself is not a reason for buying a Lexus hybrid. It's a performance car and an excellent one. It's different in the sense that one isn't driving but piloting. It's a "drive by wire" car analogous to piloting a jet fighter (" fly by wire" by necessity since the old mechanical linkages wiould be impossible). Your fuel savings may be lower but still significant the more you emulate being a jet fighter pilot.
#25 of 86
Re: How do you reset the Tank Average? [flid] by rcellio
Sep 20, 2006 (2:57 pm)
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Replying to: flid (Sep 13, 2006 11:07 am)

Thanks for the information on the owner's manual. The car was owned by Michael Nesmith of The Monkeys. (Carmel Valley, CA) He traded it in to the local Mercedes dealership, who sold it to the Lexus Dealer. I was told that he goes through cars very fast.
#26 of 86
Re: mpg data [alp8] by bmwconvert
Sep 22, 2006 (9:10 am)
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Replying to: alp8 (Sep 20, 2006 10:31 am)

I'm not expecting 30 or higher. If mileage was my primary objective, I would've gone Prius or Camry. Just curious why I'm getting lower results than some other owners.
Economy vs. performance is definitely the right way to measure this car, and on that account it's a winner. My 2001 530i got better highway mileage, but didn't come close in power/speed.

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