bad mpg

[twofourzeroSX]

hey... i am getting HORIBLE gas millage (13.4 mpg on the last tank) . It is cold out, and i do drive it hard alot...but still, i was getting about 18-20 a few months ago at 12psi. I am only running 7psi now, stock injectors, stock fuel regulator, z32 fuel filter, and 255 fuel pump. I noticed that the injector closest to the regulator looks wet. you really cant tell by touching it but it looks darker than the rest of the fuel rail. could this mean that my O-rings are bad? if so could this hurt my gas millage? what other problems could cause this.

[Nismo_Freak]

Definately replace the o-ring as a safety precaution. You don't want a leaky injector in the engine bay spraying misted fuel all over a hot engine.

Anyone with a consult can check your 02 voltages as well.

[xero1]

keep your foot off the gas. i get 26-28mpg on normal driving. 90% highway.