Bad gas mileage 300zx

[goldgabe]

i have a 1990 300zx na
im getting around 200 a tank, maybe 240 on good days
ecu. gives me a code 55, no problems
and it says the 02 sensors are good
i have new air filters, but they're stp's
and the idle fluctuates ever so slightly even after warmup
and ideas?

also, my power steering resivour is leaking from the base where it leads out, but i think thats easily fixable

[240sxChillen]

When i had a Z i would get about 250 to a tank.

[Ben G]

just do your tune up if you have not and clean your injectors not the wack ass bottle of injector cleaner in the gas tank way though.

[goldgabe]

hm, if im not mistaken it has an 18 gallon tank
so that would mean 14mpg, still doesnt sound right, i dont drive THAT aggressive
would you put premium or regular?

[goldgabe]

i have a service manual, should i just go about reading the periodic maintence?