I have a 2000 Lincoln Town Car and it is getting 14.9 MPG. Is there a problem with the car, or anything I can do to get it around 18 mpg?

Replace your before the cat oxygen sensors and disconnect your battery for 10 minutes before driving it to erase the adaptive strategies in your onboard computer. Otherwise you will think that nothing happened by changing those sensors. Try it you'll be glad you did!

That is about average for the car. You might be able to improve it with low rolling resistance tires, but the ride will be rougher. You can put on headers and bigger tail pipes and improve the air intake so there is better flow thru the engine. However the best way to improve gas mileage is to drive like an old lady. Slow starts, plan ahead for lights, do not speed, get rid of any junk you carry around in the trunk. Even then I do not see you getting 20 mpg except on the freeway going 60 mph.

Don't listen to the haters. They don't know squat. Tune it up, maintain it, and keep the oil changed. Run your tires at the proper inflation. You can rightfully expect 17.9 mog combined avg. I know, because that's what the dash shows on my 1995 Town Car.

I got 21 highway in my '69 Bonneville convertible, with a 428 4 bbl, 6 people, and luggage. At 70 mph. Newer isn't always better, G. It's all about maintainence and driving style.

Hi yes replace the lead boot. with a feather one.

No problem.

That is good enough for a 20 year old car. Get the plugs and air filter replaced and see if the mileage improves.

It is what it is. If you want better mpg, get a Toyota or Honda or a new Ford or Chevy.

This is about all you can expect from a nearly-20-year-old land yacht.

It says you are getting 14.9? Does that mean you have not actually checked the mileage yourself and are relying on the cars computer. Check it the old fashioned way to be sure the computer is accurate. Fill up, write down the mileage, drive it 200 miles, fill up, divide 200 by the gallons it took to fill it up.

The car is not the "problem" Expecting a large, heavy, inefficient, twenty year old car to do something for which it was not designed is the "problem".

The easiest way to "get it around 18-20 MPG (average city/hwy MPG)" is to replace the 20-year-old Lincoln Towne Car with a fuel-efficient vehicle which meets your mpg requirements.