2IS MPG Threads (MERGED master thread)
09-19-06, 10:17 PM
#46
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I wish I could say that the IS would be better than my current car... but it just can't beat 38mpg.
09-20-06, 05:25 AM
#47
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Using 93 octaine gas, 2500 miles on the IS 250 (RWD Auto), and mostly highway driving I'm still averaging between 31 and 32 MPG.
09-20-06, 09:52 AM
#49
The Camry was +5 Years old, had 140,000 miles and was averaging between 25 to 28 mpg, which wasn't bad for a big car that old with that much mileage.
Using 93 octaine gas, 2500 miles on the IS 250 (RWD Auto), and mostly highway driving I'm still averaging between 31 and 32 MPG.
Using 93 octaine gas, 2500 miles on the IS 250 (RWD Auto), and mostly highway driving I'm still averaging between 31 and 32 MPG.
09-20-06, 10:15 AM
#50
Pole Position
In my area 93 octane runs about $0.10 more a gallon over 87 octane. So with the IS' 17 gallon tank that's only $1.70 more for a full tank fillup. The 250 engine has a 12:1 compression ratio which works better with higher octane. My salesman said I could run 87 after I got 5000 miles but the engine management computer would retime the engine to help retardation, and therefore hurt performance slightly. For me the extra for the 93 is worth not sacrificing performance.
09-20-06, 10:22 AM
#51
The Camry was +5 Years old, had 140,000 miles and was averaging between 25 to 28 mpg, which wasn't bad for a big car that old with that much mileage.
Using 93 octaine gas, 2500 miles on the IS 250 (RWD Auto), and mostly highway driving I'm still averaging between 31 and 32 MPG.
Using 93 octaine gas, 2500 miles on the IS 250 (RWD Auto), and mostly highway driving I'm still averaging between 31 and 32 MPG.
09-20-06, 11:44 AM
#52
In my area 93 octane runs about $0.10 more a gallon over 87 octane. So with the IS' 17 gallon tank that's only $1.70 more for a full tank fillup. The 250 engine has a 12:1 compression ratio which works better with higher octane. My salesman said I could run 87 after I got 5000 miles but the engine management computer would retime the engine to help retardation, and therefore hurt performance slightly. For me the extra for the 93 is worth not sacrificing performance.
09-21-06, 07:03 PM
#53
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According to Lexus documentation your 250 needs minimum 91 octane, the same as the 350. There is only 0.2 difference in compression ratio - the 2GR has 11.8:1, the 4GR has 12:1. That's not even close to using 87 octane without the ECM dialing in a lot of preventive measures under load. If you drive with a feather foot all the time, you might get away with 87, but the ECM will not like you much when you push on the gas hard. Not only that, but if you do have a detonation related failure, Lexus would point to the minimum 91 requirement in the owner's manual and the Premium fuel only sticker on the gas door and say you brought it on yourself.
11-10-06, 09:01 PM
#54
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Join Date: May 2006
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how is everyone figuring out their avg mpg for highway and city? in my is250 rwd i only get one generic mpg average number. I usually get 24 mpg which seems really low compared to what ive seen so far in this thread. i dont even drive the car that hard. any ideas of why im getting such low mileage?
11-10-06, 10:42 PM
#55
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Im wondering why the hell im still gettin 18 MPG on every fill-up and I have 1,250 miles on my 2007 IS 250 RWD Automatic!! I do about 90% City but I still see people doing that much city and getting at least 23!! Im getting a bit ticked off!! BLEH!
11-11-06, 05:38 AM
#56
i drive 100% city and i get about 20-20.5 mpg so pretty consistant with the sticker, i only have 1850 miles, having the display on Current MPG helps me learn how to control the throttle to maximize mileage. Not a real fan of this drive by wire throttle i could control throttle position better with a with an old fashioned throttle cable
11-11-06, 10:42 PM
#59
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I'm wondering how everyone is calculating their numbers.. I'll drive the IS 2-3 days out of the week to go to work. about a 20 mile commute 30-32 min drive (about 10 miles on road + 10 miles on the freeway) i'll run errands from time to time... car has less thank 3k on it.... and i usually pump gas when i'm half empty and i've been getting between 25.5-26 mpg the last couple fill ups....based on miles driven by gallons pumped... not the # on my AVG MPG info screen
11-11-06, 11:26 PM
#60
My experience has been VERY strange... IMO, at least I don't know how many other people's IS's are like this.
I get ~17 mpg so far in the city. Keep in mind I only have 1450 miles on my car up to this point, plus much of my city driving is the three miles to and from work every day, meaning that the car probably never gets the chance to properly warm up.
BUT on the highway, I get incredible mileage. I have somewhat of a lead foot and go well above the speed limit, but I still get around 29 mpg highway, which is damn good.
That's a huge difference. So it's hard for me to make much sense of it.
I get ~17 mpg so far in the city. Keep in mind I only have 1450 miles on my car up to this point, plus much of my city driving is the three miles to and from work every day, meaning that the car probably never gets the chance to properly warm up.
BUT on the highway, I get incredible mileage. I have somewhat of a lead foot and go well above the speed limit, but I still get around 29 mpg highway, which is damn good.
That's a huge difference. So it's hard for me to make much sense of it.
Last edited by RocketGuy3; 11-12-06 at 12:47 PM.