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| This is a discussion on mudguards/flaps affecting mpg? within the Gen II Prius Fuel Economy forums, part of the Gen II (2004-2009) Toyota Prius Forums category; Hi Has anyone experienced this? I put mudguards on my prius and watched my MPG drop by 3-4. I used ... |
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mudguards/flaps affecting mpg?
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07-16-2009, 06:47 PM
| #1 |
| ape  Join Date: Jul 2008 Location: san francisco
Posts: 21
My Car: 2007 Prius Model: Package: #6 Thanks: 2
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Friends: 1 |  mud guards killing MPG? Hi Has anyone experienced this? I put mudguards on my prius and watched my MPG drop by 3-4. I used to average about 47-48 in my car and after installing them, I average 42-44. I had my car service at Toyota Magnussens in Palo ALto and noticed the drop off afterwards. Is this normal or out of the ordinary. Im tempted to take them off but I believe they glued them as well so it might be messy. Any ideas on this one? THanks  |
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07-16-2009, 06:49 PM
| #2 |
| ape Join Date: Jul 2008 Location: san francisco
Posts: 21
My Car: 2007 Prius Model: Package: #6 Thanks: 2
Thanked 0 Times in 0 Posts
Friends: 1 | mudguards/flaps affecting mpg? Hi Has anyone experienced this? I put mudguards on my prius and watched my MPG drop by 3-4. I used to average about 47-48 in my car and after installing them, I average 42-44. I had my car service at Toyota Magnussens in Palo ALto and noticed the drop off afterwards. Is this normal or out of the ordinary. Im tempted to take them off but I believe they glued them as well so it might be messy. Any ideas on this one? THanks |
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07-16-2009, 06:56 PM
| #3 |
| Senior Member  Join Date: Mar 2009 Location: Northern Kentucky
Posts: 523
My Car: 2009 Prius Model: Package: #5 Thanks: 40
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Friends: 0 | Re: mudguards/flaps affecting mpg? Did you check your tire pressures? Maybe they did you a "favor" and reset them back to OEM specs?? |
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07-16-2009, 07:00 PM
| #4 |
| Senior Member Join Date: May 2007 Location: Kansas
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Friends: 0 | Re: mud guards killing MPG? What if anything besides the flaps was done in this service? If fluids or alignment, that could cause problems, for example. You figure it will make your cd worse, and I suppose this difference could result, although it seems like a lot. If they REDUCED drag, toyota would have put them on to begin with. Suggest you do a coast down in N to a stop on a specific flat stretch. Then if you do get them removed (I'd guess they can heat the glue free), repeat in the same conditions. If you don't get measurably further, then something else was in play. Real question is how to rule out other factors before removing. Ideas, anyone?
__________________ Buying Prius soon! Mods already owned: EV Button (yes, the button, not the car yet  )ScanGuage II 3.15 w/ X-Guage (works with current vehicles) |
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07-16-2009, 07:02 PM
| #5 |
| Senior Member Join Date: May 2007 Location: Kansas
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Friends: 0 | Re: mudguards/flaps affecting mpg? There you go yard, with the obvious easy answer... |
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07-16-2009, 07:02 PM
| #6 |
| Senior Member Join Date: Mar 2009 Location: Northern Kentucky
Posts: 523
My Car: 2009 Prius Model: Package: #5 Thanks: 40
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Friends: 0 | Re: mud guards killing MPG? I wonder if the dealership did you a "favor" and returned your tires to "factory" pressure specifications?? |
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07-16-2009, 07:22 PM
| #7 | |
| Senior Member  Join Date: May 2009 Location: Idaho
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My Car: 2010 Prius Model: III Package: Navigation Thanks: 13
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Friends: 1 | Re: mud guards killing MPG? Quote:
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07-16-2009, 07:24 PM
| #8 | |
| Senior Member Join Date: May 2009 Location: Idaho
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My Car: 2010 Prius Model: III Package: Navigation Thanks: 13
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Friends: 1 | Re: mudguards/flaps affecting mpg? Quote:
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| The Following User Says Thank You to LRKingII For This Useful Post: | orionll (07-16-2009) |
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07-16-2009, 08:51 PM
| #9 | |
| ape Join Date: Jul 2008 Location: san francisco
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My Car: 2007 Prius Model: Package: #6 Thanks: 2
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Friends: 1 | Re: mudguards/flaps affecting mpg? Quote:
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07-16-2009, 08:52 PM
| #10 | |
| ape Join Date: Jul 2008 Location: san francisco
Posts: 21
My Car: 2007 Prius Model: Package: #6 Thanks: 2
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Friends: 1 | Re: mudguards/flaps affecting mpg? Quote:
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| affecting, guards, killing, mpg, mud, mudguards or flaps |
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