99blkgs Posted February 14, 2009 Share Posted February 14, 2009 Hello, I am a current lexus GS owner and am looking to purchase an IS300 as a secondary vehicle. What are some realistic numbers you guys are getting on your automatic IS's. Fueleconomy.gov rates the IS to get worse mileage than the LS430, how true is this Please share some numbers Thanks Guys. Quote Link to comment Share on other sites More sharing options...
flop170 Posted February 14, 2009 Share Posted February 14, 2009 i have a manual and i get 22/23 mpg everytime! my friend has an auto and gets the same... Quote Link to comment Share on other sites More sharing options...
99blkgs Posted February 15, 2009 Author Share Posted February 15, 2009 i have a manual and i get 22/23 mpg everytime! my friend has an auto and gets the same... excellent, now my gs im keeping that stock besides a k&n filter but this one i would like to put a cold air intake and a full exhaust, would deleting the catalytic converters help out in performance and gas mileage as well, any suggestions guys on what full exhaust to go with from the header down. thank you Quote Link to comment Share on other sites More sharing options...
flop170 Posted February 15, 2009 Share Posted February 15, 2009 i have an k&n typhoon intake and an hks drager 2 axle back exhaust and i love it.... i used to have a header as well and it made a horrid smell with no cats and the gains weren't that noticeable and it was ridiculously loud... but i didn't notice any better gas mileage with it... but an intake with the hks drager 2 sounds aggressive and in my taste sounds perfect... i would suggest them in a heartbeat! Quote Link to comment Share on other sites More sharing options...
eswint2010 Posted February 16, 2009 Share Posted February 16, 2009 Im only getting about 18 or 19 in town in my 01 auto is300 i do have a heavy foot,but does anyone got any sugestions why this might be? Quote Link to comment Share on other sites More sharing options...
joaothejester Posted February 16, 2009 Share Posted February 16, 2009 i've seen as low as 19 but normally about 21-22...btw its an 03 Quote Link to comment Share on other sites More sharing options...
eswint2010 Posted February 16, 2009 Share Posted February 16, 2009 All i have is a greddy evo2 catback and thats it, maybe i just need to keep my foot out of it Quote Link to comment Share on other sites More sharing options...
99blkgs Posted February 19, 2009 Author Share Posted February 19, 2009 how can this be since the IS is lighter than the GS considering its the same motor. Im really looking to get a second lexus but if it gets worse mileage than a ls430 then this car is out of the question, its like driving a honda crv and spending gas like an excursion Quote Link to comment Share on other sites More sharing options...
bartkat Posted February 20, 2009 Share Posted February 20, 2009 how can this be since the IS is lighter than the GS considering its the same motor. Im really looking to get a second lexus but if it gets worse mileage than a ls430 then this car is out of the question, its like driving a honda crv and spending gas like an excursion I got a constant 25 MPG highway mileage out of my 02 Is300. It's geared to offset the lack of power. The RPM at 70 MPH is higher than any car I have driven in the last 10 years. Quote Link to comment Share on other sites More sharing options...
Lexus300Stock Posted March 1, 2009 Share Posted March 1, 2009 i get 24-25mpg out of my IS300.. i have the 08 GS350 as a rent a car and i got 24-29mpg in that yesterday .. bigger engine and motor... how come it got better mpg in the GS then my car? Quote Link to comment Share on other sites More sharing options...
wurm Posted April 16, 2009 Share Posted April 16, 2009 i have the 03 lexus is 300 . stick shift 5 speed mein exhaust and a k&n intake setup. I get ruffly 18 -22 mpg. not great but its a quick ride and sexxy. On a side note... anyone here tell me why in the middle of my speedometer i got a mpg gauge that goes from 0-80? is 80 ever really possible even in a hybrid lol or am i just dumb and the mpg stands for somthing completely differnt? Quote Link to comment Share on other sites More sharing options...
flop170 Posted April 16, 2009 Share Posted April 16, 2009 i have the 03 lexus is 300 . stick shift 5 speed mein exhaust and a k&n intake setup. I get ruffly 18 -22 mpg. not great but its a quick ride and sexxy. On a side note... anyone here tell me why in the middle of my speedometer i got a mpg gauge that goes from 0-80? is 80 ever really possible even in a hybrid lol or am i just dumb and the mpg stands for somthing completely differnt? that mpg gauge is pretty much a conversation piece lol..... Quote Link to comment Share on other sites More sharing options...
wurm Posted April 16, 2009 Share Posted April 16, 2009 lol figured. I even asked dealer about it when i bought car.. he told me its lexus it can get 80mpg. I said your full of *BLEEP* give me the keys. Quote Link to comment Share on other sites More sharing options...
felty52 Posted September 28, 2009 Share Posted September 28, 2009 i get around 25.5mpg i calculate it just about every tank but i drive mostly highway and cruise around 75mph. Quote Link to comment Share on other sites More sharing options...
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