Lincoln LS Gas Mileage

Lincoln LS

  1. blwnbyu

    blwnbyu Dedicated LVC Member

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    My 02 LS8 only gets 22-23 on the highway. 50k miles. New Coils, Plugs, and Valve Cover Gaskets. I once got 26 when I first got it and then the mileage seems to have gone to **** and I don't know why. I originally thought it was just because of the sentas, but, the mileage has not returned even when I switched back to stock wheels
     
  2. LS4me

    LS4me Dedicated LVC Member

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    What other weight are you carrying around? As in audio equipment.......
     
  3. blwnbyu

    blwnbyu Dedicated LVC Member

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    About 20# over what was in it factory. When I had the valve covers off, it was the cleanest engine I've ever seen inside. I'm driving 1700 miles next week. I'm going to clean the maf and see what happens. (I'm sure I cleaned it when I did the valve covers though
     
  4. joegr

    joegr Dedicated LVC Member

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    Also, what octane gasoline? Stock intake? Speed? Interstate with no stop and go?
     
  5. LS4me

    LS4me Dedicated LVC Member

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    And what brand fuel? Top-Tier? Ma & Pa's el Cheapo?
     
  6. blwnbyu

    blwnbyu Dedicated LVC Member

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    91 Ethanol Free. I'm at 5000 ft. Stock Everything. Strictly interstate. The part that bugs me most is I got 26 on a highway trip the week I got the car and have never been able to get close to since
     
  7. blwnbyu

    blwnbyu Dedicated LVC Member

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    I work in the three refineries that supply fuel around here. I use Cenex usually. Sometimes ExxonMobil. Always Ethanol Free
     
  8. LS4me

    LS4me Dedicated LVC Member

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  9. blwnbyu

    blwnbyu Dedicated LVC Member

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    Ironically, the car seems to get better mileage the faster I go. The gears on the first gens are way too tall. On the instant trip, instant getter 1.5 mpg better at 90 than I do at 70.. I got up to 23.0 doing 90 over a 60 mile stretch
     
  10. LS4me

    LS4me Dedicated LVC Member

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    Here are some sites on altitude induced power loss. Looks like you're looking at a 15%-20% power loss at 5K feet. There is a corresponding loss of MPG, though I don't know that formula.....
     
  11. blwnbyu

    blwnbyu Dedicated LVC Member

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    I understand the loss from altitude. The puzzling part is when I achieved 26 when I first got it and then longer came close. I'll track my mileage to Ohio and see what happens. I also pumped the 16s up to 38# to see if there's a difference. I have a list of all ethanol free stations so I'll try to strictly run ethanol free along the way
     
  12. Telco

    Telco Dedicated LVC Member

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    Might be the car called for more throttle opening to make up for the lack of power, which reduces pumping losses as the throttle plate acts as a restriction which makes the car have to work harder to draw in air. To experience the effects for yourself breathe through a straw, then without. It's a lot harder to draw in air through the straw.

    My own car is getting around 18.5 now, but I spend a lot of my life at 40MPH these days as I generally go to work and back these days and it's all low speed roads.
     
  13. blwnbyu

    blwnbyu Dedicated LVC Member

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    I might do some datalogs through torque at 70 and at 90 just for ****s and giggles
     

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