Kuboshi

Erm... it was really hard using the search wit the more then 4 letter limit... My IS 250 is currently at 2,400 miles and I drive it 100% city in Irvine by UCI. I've been trying to squeeze as much as I can from it in terms of mileage - ie: I would drive and whenever possible would let off the gas and let inertia take over... however I've only been getting 17miles per gallon! Is this right? EPA said 24 city... and I know its off by some 10-15% because of old measuring standards... and I know that Irvine is somewat hilly... but still 17mpg only? Is there something wrong wit my IS? Is it still in "Break in"? or am I just unlucky? Thanx for any help! Also, I did one fuel up where I rev it a lot to 4k-5k whenever possible. and leave ECT Power on... and I got 16mpg from that... which was expected but the 17mpg is when I drive VERY conservatively.