Last post on Jan 14, 2008 at 2:02 PM
You are in the Lexus IS
What is this discussion about?
Lexus IS 350, Lexus IS 250, Fuel Efficiency (MPG), Sedan
#34 of 41 Re: Terrible MPG brand new car!! [freebird2000]
Mar 25, 2007 (7:04 am)
You need to go through a few tankfuls to get the correct MPG. What you're seeing is the result of the car idling a lot while still at the dealer.
#35 of 41 Re: IS 350 Fuel Economy [maxidrive]
May 01, 2007 (6:33 pm)
I recently ran 120 miles in my IS350 at an average speed of 110 mph and it got 16.32 mpg.
To answer the inevitable question of where did I average 110 - check out http://www.bborr.com/home.html
#36 of 41 Re: IS 250 Fuel Economy [maxidrive]
May 22, 2007 (5:05 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]
May 22, 2007 (5:26 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
#38 of 41 My first tank has average 22mpg
May 22, 2007 (9:23 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]
Jul 27, 2007 (7:09 pm)
You're still in break-in. Give the car another 2k-3k miles to see a jump in the mileage.
Jul 28, 2007 (9:01 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
Jan 14, 2008 (2:02 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.