poor gas mileage on 1997 Lexus ES300

it seems like this car has poor gas mileage is this common for this car being a v-6 engine.

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2 answers
Check out this link
http://www.fueleconomy.gov/Feg/bymake/Lexus1997.shtml
If your gas mileage is less a scan tool can be used to measure fuel trim figures to see if they are abnormal.
I'm having the same issue. Some tanks i get great gas mileage then with similar driving the next tank i will get 20 mpg with highway driving.