Drop in gas mileage, sluggish feeling

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by sarah millender, Jul 25, 2017.

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  1. sarah millender

    sarah millender New Member

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    2007 Prius
    Model:
    Four Touring
    hello!

    This is my first post here. I drive a 2007 Prius that has 204K. Yeah, I know. Anyways, my uncle changes my oil regularly for me and 2 months ago in May my I noticed after my uncle changed my oil that there was a sudden drop in mileage. I asked several times if he did anything differently and he said no. He changed the oil (5w-30 synthetic) and replaced the air filter. The car was getting an average of 41 MPG which has dropped to 35-37 MPG. The car feels like its sluggish when accelerating. About a month later I had BOTH batteries completely replaced. I am still having the same issue with my car, however. Still feels like it's dragging a lot. Any ideas on what I can do?
     
    #1 sarah millender, Jul 25, 2017
  2. tankyuong

    tankyuong Senior Member

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    needs major tune up
     
    #2 tankyuong, Jul 25, 2017
    jerrymildred likes this.
  3. jerrymildred

    jerrymildred Senior Member

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    Probably a tune up. Don't forget the cabin air filter. That can make a big difference, especially since you're probably using the air conditioner pretty heavily these days.

    And the tire pressure.
     
    #3 jerrymildred, Jul 25, 2017
  4. FuelMiser

    FuelMiser Senior Member

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    Recommend you follow the Gen 2 Forum, not Gen 3. That's the correct spot for your 2007 Prius...
     
    #4 FuelMiser, Jul 25, 2017
  5. bisco

    bisco cookie crumbler

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    have someone besides your uncle check the oil level and make sure everything is sealed around the air cleaner, and the filter is installed properly.
     
    #5 bisco, Jul 25, 2017
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