NISSAN TRUCK ENGINE POOR MILEAGE

1989 Nissan Hardbody 2wd Mileage: 267,000. Help Me Bob And Ken! I Am Having A Terrible Gas Mileage Problem. In The Last 8 Months, My Fuel...

I Have A 1600c Petrol Running Thirsty. Had Carb Adjustment And New Air Cleaner Spark Plugs Etc

I Own A 93 Nissan 4x4 Ext Cab Hardbody And Right Now Im Getting 11 Mpg In Town And 14 On The Highway. Is That What It Should Get Or If It...