IS 350 MPG's vs. GS 350 MPG's
#1
Lexus Test Driver
Thread Starter
IS 350 MPG's vs. GS 350 MPG's
Is there any way a base 2015 GS 350 AWD could have better MPG’s than a 2014 IS 350 AWD F Sport, such that F Sport tuning diminishes MPG’s?
Thanks!
Thanks!
#2
Lexus Test Driver
Thread Starter
GS 350 MPG's vs. IS 350 MPG's
Is there any way a base 2015 GS 350 AWD could have better MPG’s than a 2014 IS 350 AWD F Sport, such that F Sport tuning diminishes MPG’s?
Thanks!
Thanks!
#3
Gearing and curb weight will have a lot to do with MPGs. I believe the engines are identical but one could be mapped differently.
#6
Lexus Test Driver
Thread Starter
Okay; thank you very much, Gentlemen!
Anyone know if the engines are mapped differently? Maybe there’s different transmission gearing? Or the exhaust setup could be different as well?
Anyone know if the engines are mapped differently? Maybe there’s different transmission gearing? Or the exhaust setup could be different as well?
#7
Lexus Test Driver
Thread Starter
Hmm, before I get involved in another MPG mess, wish there was a way to know.
No matter what I do, I've always gotten dismal MPG's in my IS; hope only due to F Sport.
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#8
I drive mostly stop and go city miles, say 60/40 and I generally get about 18 to 20MPG on my 2013 AWD GS FSport. I tend to drive fast on the expressway but best I have gotten was 28MPG cruising at about 65MPH.
In theory though under normal driving conditions the IS350 would get better MPGs as it is about 500lbs lighter.
In theory though under normal driving conditions the IS350 would get better MPGs as it is about 500lbs lighter.
#9
Lexus Test Driver
It should be the same between both IS and GS 350s. The IS 250 loaner I got had worse MPG than my GS I think cause I keep revving it to get more power out of it Vs. the 350 engine u barely tap it and it flies.
#11
Same here. I kept it in Sport mode and the revs were always high. The 250 is not for me.
#12
Lexus Champion
I assume this is based on your disappointment with your IS350 AWD F Sport mileage and desire to trade it in for a GS350 AWD, and hoping you will achieve better mileage.
There isn't anything specific to an F Sport IS that would give it better or worse mileage than a standard IS. Given that an AWD GS350 weighs about 230 lbs more, I would suspect a GS would not get better mileage than your IS, assuming your IS is working properly.
EPA estimates for the AWD GS are 19/26/21, which is the same rating as the IS350 AWD.
There isn't anything specific to an F Sport IS that would give it better or worse mileage than a standard IS. Given that an AWD GS350 weighs about 230 lbs more, I would suspect a GS would not get better mileage than your IS, assuming your IS is working properly.
EPA estimates for the AWD GS are 19/26/21, which is the same rating as the IS350 AWD.
#14
The pursuit of F
Factor in tires and width as well (rolling resistance). I believe the GS AWD has a narrower square setup vs the IS F Sport AWD with the staggered (and "fat" 255s in the rear).
Same transfer case UF1AE and same A760H 6-speed automatic tranny in both GS AWD and IS AWD with virtually identical ratios.
Same transfer case UF1AE and same A760H 6-speed automatic tranny in both GS AWD and IS AWD with virtually identical ratios.
#15
Lexus Test Driver
Thread Starter
I assume this is based on your disappointment with your IS350 AWD F Sport mileage and desire to trade it in for a GS350 AWD, and hoping you will achieve better mileage.
There isn't anything specific to an F Sport IS that would give it better or worse mileage than a standard IS. Given that an AWD GS350 weighs about 230 lbs more, I would suspect a GS would not get better mileage than your IS, assuming your IS is working properly.
EPA estimates for the AWD GS are 19/26/21, which is the same rating as the IS350 AWD.
There isn't anything specific to an F Sport IS that would give it better or worse mileage than a standard IS. Given that an AWD GS350 weighs about 230 lbs more, I would suspect a GS would not get better mileage than your IS, assuming your IS is working properly.
EPA estimates for the AWD GS are 19/26/21, which is the same rating as the IS350 AWD.
Unfortunately, yes, I've noticed that the EPA estimates are identical. :|
Thanks.