41 messages,
Last post on Jan 14, 2008 at 3:02 PM
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Lexus IS Forum.
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Lexus IS 350, Lexus IS 250, Fuel Efficiency (MPG), Sedan
#36 of 41 Re: IS 250 Fuel Economy [maxidrive]
by mrollie
May 22, 2007 (6:05 pm)
My 250 has 4000 miles and has averaged since new 27.0. The current tank (Hess 93) is giving 25.9.
Not bad for a fun little car.
#37 of 41 Re: IS 250 Fuel Economy [mrollie]
by freebird2000
May 22, 2007 (6:26 pm)
Just ran a full tank on the highway, about 340 miles no more than 10 miles in city conditions. Average speed 75 mpg (per the gauge). Fuel economy: 24mpg. THAT seems rather low. Any suggestions? Am using 91 oct. fuel and car has about 1950 miles on it. Got it in March...any thoughts would be appreciated... thanks
Jason
#38 of 41 My first tank has average 22mpg
by nicecars
May 22, 2007 (10:23 pm)
My IS 250 has average of 22mpg. I have about 50% hwy, 50% local. It is below my expectation caz I used to have a toyota camry, which delivers average of 25mpg for 100,000 miles.
#39 of 41 Re: IS 250 Fuel Economy [freebird2000]
by carmonkey
Jul 27, 2007 (8:09 pm)
You're still in break-in. Give the car another 2k-3k miles to see a jump in the mileage.
Jul 28, 2007 (10:01 pm)
I am at 28mpg with 70-80% hwy. I have found that it drops if using cruise control and dips at and above 80 mph.
#41 of 41 Observation
by ar39
Jan 14, 2008 (3:02 pm)
I've observed Sunoco premium gives me a better mpg over other brands of gasoline, with 75% hwy 25% city driving in my 2006 IS250 AWD.
Sunoco 91 - 28.4
Exxon/Shell 93 - 27.7
BP 93 - 26+
Measurements were taken in similar driving conditions. Also, these are not dash monitor reading but, miles/distance calculation. The car monitor shows variance of +1.3 miles.