Bridgestone Ecopia EP422 Plus - MPG hit?

Discussion in 'Gen 3 Prius Fuel Economy' started by Daryl K, May 18, 2016.

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  1. Daryl K

    Daryl K Member

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    Has anyone else tried this tire on a 3rd gen Prius? After 60k miles the OE Goodyear Assurance tires were pretty threadbare, so I took advantage of Bridgestone's rebate and got a set of four new EP422's mounted.

    The tires are softer, which I actually don't mind as this is my commuter car (90 miles / day round trip) and it softens the harsh ride up a little, but my MPG has taken a HUGE hit.

    Normally around this time of year I average upper 50s, and frequently break 60 mpg on my work route. Now it's more like upper 40s, and one time I cracked 50; 50.6 mpg, to be exact.

    Will this improve with time? Although I've had the car since new (nearly 4 years now) this is my first new set of tires on my first Prius, so not sure what to expect.

    Thanks!

    Daryl
     
    #1 Daryl K, May 18, 2016
  2. IMkenNY

    IMkenNY Im just being nosy

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    Yes it will improve, give it at least 500 miles.
    Is your tire pressure up to where you ran your old tires?
     
    #2 IMkenNY, May 18, 2016
  3. Daryl K

    Daryl K Member

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    I think Costco did it right to the sticker. I usually ran 3-5 psi high. Not a huge difference...
     
    #3 Daryl K, May 18, 2016
  4. DonDNH

    DonDNH Senior Member

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    No its not a huge difference; but it might be enough to contribute to the worse mileage.
     
    #4 DonDNH, May 18, 2016
  5. BruceInOKC

    BruceInOKC Member

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    Although I can't speak for the Goodyear Assurance Fuel Max, I know the Bridgestone Ecopia EP422 Plus has given me better mileage than the Yokohama Avid S33D and Bridgestone Ecopia EP20.
     
    #5 BruceInOKC, May 22, 2016
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  6. Daryl K

    Daryl K Member

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    Good to know - especially since I was considering the EP20 (and close to getting them).

    Thanks!
     
    #6 Daryl K, May 25, 2016
  7. solrunner

    solrunner Member

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    I have the EP422 Plus. I did not notice any MPG difference compared to the previous (OEM) tires, EP20.
     
    #7 solrunner, Jun 1, 2016
  8. Daryl K

    Daryl K Member

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    Well, I don't necessarily see an improvement (over the original GYs), but after a month and over a thousand miles I am back to the mileage I used to get for this time of year. My drive in this morning was 60.5 mpg - perfectly satisfactory.

    I wonder if it's the mold release compound, new-ish tread, or what that so heavily kills mileage when new tires are installed.
     
    #8 Daryl K, Jun 20, 2016
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  9. CR94

    CR94 Senior Member

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    Mainly the fact that the tread is thicker than it will ever be again.
     
    #9 CR94, Jun 20, 2016
  10. Kurt Weiske

    Kurt Weiske Active Member

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    I noticed, with my stock EP20s that I got an approximately 2mpg increase and radically improved cornering once they broke in, around the 500 mile mark.
     
    #10 Kurt Weiske, Jun 21, 2016
  11. shri_chanakya

    shri_chanakya Junior Member

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    I just got these on my 2011 Prius III. It was pretty sweet deal 328 out of the door at costco. I do see a hit in mileage I was getting around 56 to 58 on the worn out Yoko S33 (lasted only 38.5K miles).

    422+ are still new only 70 miles so far. Costco also put tire pressure as per toyota (35/33). I was running my Yoko at (41/39). Did argue with the installation guy but he won't budge and given me good gyan on why recommended pressure is best.

    Going today to get lug nuts checked (routine after 25 miles), might get it upped if some other guy is there.
     
    #11 shri_chanakya, Jul 29, 2016
  12. bisco

    bisco cookie crumbler

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    you need to be able to check and adjust your own tyres pressure. or can you swing by costco anytime for a freebie?
     
    #12 bisco, Jul 29, 2016
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  13. Eclipse1701d

    Eclipse1701d Prius Enthusiast

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    I have put almost 20,000 miles on my first set of the 422+. No mpg loss and WAY better than the stock Toyo's!
     
    #13 Eclipse1701d, Jul 29, 2016
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  14. bisco

    bisco cookie crumbler

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    are they quieter?
     
    #14 bisco, Jul 29, 2016
  15. shri_chanakya

    shri_chanakya Junior Member

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    They are as quiet as or as loud as the OEM equipped Yokohama s33.

    Posted via the PriusChat mobile app.
     
    #15 shri_chanakya, Jul 29, 2016
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  16. shri_chanakya

    shri_chanakya Junior Member

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    I can but costco puts nitrogen in the tires. So do not want to mix air with nitrogen even though 75% air is nitrogen
     
    #16 shri_chanakya, Jul 29, 2016
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  17. PriusC_Commuter

    PriusC_Commuter Active Member

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    I'm getting these put on my PiP at Costco in a few days. I took advantage of the $70 Bridgestone rebate plus $60 off executive members. I'm happy with $320 OTD for tires.
     
    #17 PriusC_Commuter, Jul 30, 2016
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  18. CR94

    CR94 Senior Member

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    Yeah, that mixture might be explosive.
     
    #18 CR94, Jul 31, 2016
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  19. wjtracy

    wjtracy Senior Member

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    Thought about it for my daughters Civic but the lower winter snow/ice traction ratings always scare me off. Wish Costco had some lower price tires other than 422's.
     
    #19 wjtracy, Aug 1, 2016
  20. Eclipse1701d

    Eclipse1701d Prius Enthusiast

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    They are quieter than the Toyo's, but the car does transmit a lot of road noise, due to the lack of sound deadening...
     
    #20 Eclipse1701d, Aug 1, 2016
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