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Toyota Echo Real World MPG

345 messages,  Last post on Oct 04, 2009 at 10:34 PM

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What is this discussion about? Toyota ECHO, Fuel System, Fuel Efficiency (MPG), Sedan

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#340 of 345 Re: A/C vs cold weather [bottgers] by thegreyone Oct 03, 2009 (10:22 am)
Replying to: bottgers (Aug 28, 2006 10:33 am) Coming from Edmonton (northern Canada) where temperatures are often under - 20 degrees Celcius (-4 degrees Fahrenheit) Although an electric block heater acts as insurance for getting the vehicle started on frigid mornings, there still needs to be a warmup period to get the ice scraped off the windows and the windows all defogged... so we certainly are at the 20% drop of efficiency. And I was interested when the "Mythbusters" TV show did a "A/C vs Open Windows" episode showing that at speeds over 55 mph that A/C is certainly more efficient than the open windows that cause lots of drag due to air friction... especially for sedans that are more streamlined than SUVs. Open windows decreased the mpg by about 20% !!!!!! Below is an interesting link about a similar study... with references. /denis">link title
#341 of 345 drag by kneisl1 Oct 03, 2009 (11:59 am)
I have a hard time believing that open windows would make your mileage go from 40 mpg to 32 mpg on the freeway at 75 mph. Maybe its true? Replies to this message: dake (Oct 03, 2009 1:43 pm) thegreyone (Oct 04, 2009 12:05 pm)
#342 of 345 Re: drag [kneisl1] by dake Oct 03, 2009 (1:43 pm)
Replying to: kneisl1 (Oct 03, 2009 11:59 am) Drag increases exponentially with speed, so I wouldn't be totally surprised. Replies to this message: thegreyone (Oct 04, 2009 12:05 pm)
#343 of 345 Re: mpg [nippononly] by mcdawgg Oct 04, 2009 (5:23 am)
Replying to: nippononly (Oct 01, 2009 5:17 pm) I once read somewhere that when tires are brand-new, they will get less mpg because of the mold release stuff still on them. I don't know if it's true or not. Replies to this message: nippononly (Oct 04, 2009 10:34 pm)
#344 of 345 Re: drag [dake] by thegreyone Oct 04, 2009 (12:05 pm)
Replying to: dake (Oct 03, 2009 1:43 pm) And I'm also not surprised that the windows down doesn't make as much of a difference for the more box-like SUVs compared to the more streamlined sedans and coupes. But 20% change in gas mileage is significant.
#345 of 345 Re: mpg [mcdawgg] by nippononly Oct 04, 2009 (10:34 pm)
Replying to: mcdawgg (Oct 04, 2009 5:23 am) Well, I hope so, because I want my 42 mpg average back! :-|   Certainly as tires age, the rubber hardens even if they still have a lot of tread, and that hardening decreases traction but increases fuel economy.

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