It is common for new cars to have poor initial mileage. The engine tolerances are very tight in order to meet emissions requirements and so the engine and driveline friction is initially quite high. Over the first few thousand miles the engine and driveline will wear in a little bit, reduce the friction, and your MPG will gradually improve.

 

Yes, I agree with the dinging worries. Surprised to see that the IS does not have ding-guards on doors.

 

I'm looking through the lexus website and it shows that the 350 gets better MPG than the 250?

 

it actually depends on which 250 ?? the awd version is much heavier at 3600lbs or so and i guess thats why the mileage isnt as good as it should be. im running at high teens in the city and mid twenties on the hwy

 

250 manual gets poor mileage vs the others, 350 gets 21/28 and 250 gets 24/something I believe

my 350 hasnt been broken in yet and I did 21 mpg 100% city, so it should improve after a few 1000 miles

 

IS250 AT RWD Premium Package is 24 city/32 hwy.

I have been averaging 28 MPG mixed hwy/city commute to and from work. I fill up the tank almost every two weeks.

 

I'm getting a steady 32.5 mpg but I do most of my driving freeway (92 miles round trip)... pleasant surprise, I'm saving money on gas now

 

I get between 23-25mpg on my 350 with a mix of freeway and city driving.

 

I get 21-22 MPG local and if I drive over 60 miles I can average a little over 30 MPG on the freeway (light traffic going around 75mph). I usually drive around 75% local and 25% freeway and my total tank avg is around 21.5 MPG. Oh yea, this is for the IS350...

 

lexus website shows

350 rwd 20/28
250 rwd 21/28 (manual)

is that a mistake?

 

Rated at 20/28, which is less than the IS250 slush-o-matic, but basically the same as the IS350 slush-o-matic. I easily get 31+ in highway driving (250, manual trans.). I've never paid much attention to around-town numbers.

 

On a side update... I just got my first gas card bill since getting the IS 250 and it looks like I'm saving $118 on gas over my 2002 Camry XLE that the IS replaced. SWEET!

 

I'm getting about 23.5-24 city and 30-32 highway in my IS250 RWD automatic. If I drive on the interstate at constant speeds I have averaged up to 38 mpg.

 

22.8 on is350... daily commute in crap highway traffic 80% of the way 20% local

 

I get like 24.8 with 80% city 20% highway.. but the car is still under 2k miles...