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I. Silva
I. Silva, ASE Certified Technician
Category: Subaru
Satisfied Customers: 1649
Experience:  auto mechanic
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Subaru Legacy L: 1997 Legacy L....mileage has dropped to 15mpg.

Customer Question

1997 Legacy L....mileage has dropped to 15mpg. Car has 204,000 miles on it. Runs great but mileage has plummeted.
Submitted: 2 years ago.
Category: Subaru
Expert:  I. Silva replied 2 years ago.
Hello...welcome and thank you for using Justanswer.
Make sure your air filter is clean ,the spark plugs are in good shape and replace the up steam O2 sensor(closest one to the engine) ,make sure the tire pressure is good
Good luck.
Let me know.
Thank you.
Customer: replied 2 years ago.
Done all those except 02 sensor.....
Expert:  I. Silva replied 2 years ago.
Well if the engine is running good ,I would replace the upstream O2 sensor ,make sure there is no vacuum leaks (not very common on this engine) and make sure there is no fuel leaks ,tight all the fuel line clamps at the fuel filter and at the fuel rails.
Good luck.
Please rate my answer if I have helped, ask for additional info if needed.
Thank you very much.