Severely bad gas mileage.
Can't get 200 miles out of a full tank. Replaced 02 sensor after Emissions light came on. Brought it to a mechanic who gladly took my $100 to turn the light off and apparently do nothing else. 10-12 miles per gallon...seriously.
Problem free regardless of that. Never lost power or ran rough. Dependable transportation just costly in the petrol department. I'm jealous of all the other Nissan truck owners who received nothing, but class A pickup.
Try replacing the Fuel pump, air filter, plugs and wires. These relatively inexpensive thing should help with your gas millage.