Is anyone else getting better gas mileage in Sport mode than in Eco mode?
01-11-18, 12:06 PM
#16
drives cars
That the key there. HVAC. It signals the computer to compensate for the additional load. Not eco, normal or sport. The only thing Eco, normal, sport or sport + does is adjust the throttle response, remap the transmission shift pattern, adjust the HVAC system, or on the Sport + adjust the suspension and steering firmness. It's like this on all the newer Lexus that I have driven in.
So, sure - the idle isn't going to be affected, but your observed engine speed will be. I think this was just a case of semantics honestly.
01-14-18, 02:02 AM
#17
I think the reason has to do with how much less time I spend accelerating using Sport mode, both in the city and on the highway.
In Sport mode I can get up to a cruising speed much quicker, be it 40 MPH (city) or 65 MPH (hwy) and then can lay off the pedal and just cruise, saving on MPG’s sooner than Eco mode.
Of course it's just a matter of adjusting your driving style in ECO mode but it is noticeably slower if it isn't pushed.
I'm having some issues with fuel consumption im getting 18.2 MPG in ECO mode with mostly city driving. I think it should be better and it might be my driving style. I'm just going to drive in normal mode and see how I go with it.
01-15-18, 06:58 AM
#19
drives cars
Yes! It stays low until the next time I come to a stop. Pretty odd, but useful if you don't like the higher revs when stopped.
03-26-18, 12:12 PM
#21
In addition to reducing throttle sensitivity and programming shift points for fuel economy, ECO also delays the deployment of the active spoiler. While it probably makes minimal impact, the spoiler deploys at 80mph in ECO vs 50mph in every other mode reducing fuel drag and fuel consumption.
03-26-18, 12:17 PM
#22
drives cars
In addition to reducing throttle sensitivity and programming shift points for fuel economy, ECO also delays the deployment of the active spoiler. While it probably makes minimal impact, the spoiler deploys at 80mph in ECO vs 50mph in every other mode reducing fuel drag and fuel consumption.
03-26-18, 04:35 PM
#23
So when Lexus quotes mpg fuel economy figures for the various IS models, what mode is Lexus achieving these results? Eco, Normal or Sport? I'm also sure when they run these tests they have less than 1 gal in the tank to get the car as light as possible.
03-26-18, 04:59 PM
#24
I noticed the same thing and was not surprised. It's not efficient to get up to speed slowly unless you have electric motors assisting you.... that's why eco mode is only good on the freeway and/or when you are going at constant speed. So for me, it's usually eco mode on freeway, sport mode around town.
03-26-18, 07:19 PM
#25
drives cars
I noticed the same thing and was not surprised. It's not efficient to get up to speed slowly unless you have electric motors assisting you.... that's why eco mode is only good on the freeway and/or when you are going at constant speed. So for me, it's usually eco mode on freeway, sport mode around town.
03-26-18, 10:44 PM
#26
Sometimes when I drive in Eco Mode, I ask is this how driving a 250 feels like? Anyways, Eco mode helps a little bit for me in traffic, like stop and go, sport mode just drops my mpg.
03-27-18, 06:32 AM
#27
Granted my car is a 08 ISF, but I get 3MPG better in sport over normal mode, and that is including the spirited jaunts that you want to have with a ISF in sport mode. So I don't find your suspicious unusual.
03-27-18, 07:42 AM
#28
Lexus Champion
They test it in Normal mode. When the automakers perform this EPA specified test, they have to use the worst/most aggressive mode that the car can start up in. This is why the cars cannot start in SportS/SportS+ mode. If they could, then the EPA test would need to be done in SportS mode.
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