2004 Town Car mileage drop of 2 MPG

5

Asked by May 15, 2017 at 11:25 AM about the 2004 Lincoln Town Car Signature

Question type: Maintenance & Repair

2 MPG drop isn't much, but .....  why?  Note:  No codes.
I am not actively looking to resolve this until codes are received.
But, other Town Car owners are encouraged to reply.
2004 Town Car with 102,000 miles and NO oil added between 5,000 mile
changes.  I.E., cannot come up with a good reason to buy another car.
City driving went from 19 to 17.  (I know, not bad for 4.6 power)
Highway went from 26 at 75 mph average to 25 at 65 mph average.
Began Approximately after getting 2 new tires + alignment.
Prior to that, replaced plugs and coils as preventive maintenance
with no affect on gas mileage.
Air filter is slightly dirty.  Tire pressures checked regularly.
Previous mileage obtained while using 5W20 semi-synthetic.
Moved from PA to FL and decided to use 5W30 semi-synthetic.
Anyone see that slight change of viscosity make a difference?
Personal thoughts include O2 sensors and catalytic converter.

2 Answers

74,375

Heavier oil viscosity can reduce power and mileage. Moving also means you are burning a different fuel blend. Some tires are more fuel efficient than others. https://www.tirerack.com/tires/tiretech/techpage.jsp? gclid=COThr9Cu8tMCFQhrfgod8PoDQQ&techid=175&affiliate=H M5&s_kwcid=AL!3756!3!72457434373!b!!g!!&ef_id=WH1QCwAAB XY2zBGZ:20170515165454:s

12,805

Upstream 02 sensors... have the fuel trims read in real time using a IDS VCM scanner. This ends all guessing.

Your Answer

Lincoln Town Car Experts

  • #1
    Tracy Hooks
    Reputation
    1,630
  • #2
    Tom Demyan
    Reputation
    1,620
  • #3
    tennisshoes
    Reputation
    1,190
View All

Related Models For Sale

Used Ford Crown Victoria
10 listings starting at $5,995
Used Lincoln Navigator
92 listings starting at $7,888
Used Chrysler 300
96 Great Deals out of 1,042 listings starting at $1,995
Used Chevrolet Impala
60 Great Deals out of 932 listings starting at $1,900
Used Mercedes-Benz S-Class
7 Great Deals out of 147 listings starting at $5,999
Used Cadillac CTS
21 Great Deals out of 333 listings starting at $2,900
Used Ford Mustang
7 Great Deals out of 1,191 listings starting at $3,350
Used Ford F-150
456 Great Deals out of 9,151 listings starting at $922

Used Cars For Sale

2011 Lincoln Town Car For Sale
1 listings starting at $14,998
2007 Lincoln Town Car For Sale
2 listings starting at $11,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.