IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models
View Poll Results: How much MPG average do you get?
<11 mpg
2
3.39%
12-14 mpg
1
1.69%
15-18 mpg
14
23.73%
19> mpg
42
71.19%
Voters: 59. You may not vote on this poll

Poll: Fuel Economy on IS250

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Old 01-05-13, 12:15 AM
  #16  
mylilpony
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i have a 2012 is250 rwd and i drive quite a lot. about 6 weeks old and i put 2300 miles on it already. I live in LA and i average aroudn 21. I go to school in SD so when i drive back or forth sometimes, i average liek 26 highway. Combined, i average 23-24. Its funny cause sticker says 21/30 which is not realistic..unless you are driving speed limit in no traffic
Old 01-05-13, 09:35 AM
  #17  
Nikon
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2008 RWD is250. i average about 28mpg. usually anywhere from 26mpg on a harder driven tank and up to 31mpg on high road trips cruise controlled at 70mph-ish.

my goal is always to reach 400 miles on the tank. then i know i'm doing good
Old 01-08-13, 05:10 PM
  #18  
surensm
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Well good news everybody. Fixed the problem. IDK how but it kept showing 15- mpg so I went and reset the mpg display now its at 21+
Old 07-14-21, 04:46 AM
  #19  
SnrJay
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Default Same thing

Originally Posted by surensm
I was wondering if its just me or the car's fuel economy ratings are a tad bit over-exaggerated. I was getting 13 before I took a 2 hour total freeway drive and it went up to 16 mpg avg on the little display just about the dials. Is that a reliable source of info about fuel consumption? I'm not driving aggressively either, keep the rpms under 4k (although i did redline a couple of times).
My friend got a 2006 Lexus is250 rwd last month and we noticed there were some very weird modifications made to the two overhead camshafts, before we fixed it we were getting like 18mpg city but now it has never gone above 12mpg city. we are thinking it's because of the fuel we buy but honestly we're stumped
Old 07-17-21, 04:19 PM
  #20  
MrHarris
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Originally Posted by SnrJay
My friend got a 2006 Lexus is250 rwd last month and we noticed there were some very weird modifications made to the two overhead camshafts, before we fixed it we were getting like 18mpg city but now it has never gone above 12mpg city. we are thinking it's because of the fuel we buy but honestly we're stumped
try these additives to your gas tank. Miracles happened for me:


-liqui moly pro line fuel system cleaner
-star tron ring and clean and/or fuel tank cleaner
Old 07-17-21, 07:32 PM
  #21  
XSV
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I averaged ~19 mpg city/highway. Saw the decrease in mpg after I put on 19" wheels on.
Old 07-21-21, 01:31 PM
  #22  
SoSoDave
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I get about 32 combined, and seen as high as 46 on the highway. IS250 convertible.
Old 07-22-21, 07:51 AM
  #23  
sqlboy2000
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I had a 250 for 2 years and I doubt I ever got over 23.
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