Mercury Sable Engine Poor Mileage

Recently Purchased This Sable And It Seems To Run Fine But It Really Sucks Down The Fuel

I Have A 97 Mercury Sable Gs That Has Been Not Running Right. When Its Idling Its Rough, When You Step On The Gas There Seems To Be A Lack...

As Earlier Stated Starts Easy Runs & Idles Nicely But Seems To Get Bad Gas Mileage. (no Leaks In Gas Tank) Ha Ha I Also Have No Messages...

I Just Purchased A 1997 Mercury Sable With A 3.0 Liter Engine & 175,000 Km. (100,000 Miles Approx.). It Idles Fine & Starts Up Easily...

58.000 Miles, Car Does Not Use Oil. Trnsmission Seems Free - Car Coasts Freely. We Drive Slowly - 55 - 60 Mph. Mileage Is About 17mpg...