Gas Savings Tips That Don't Actually Work! - Toyota Yaris Forums

detroiter · 03-07-2011, 05:05 PM

I disagree with the air filter one. Driving with a clogged air filter doesn't change fuel economy because of the OBD? That's like saying I can run a marthon in my shoes without soles just because I have laces still.

MadMax · 03-07-2011, 06:06 PM

Quote:

Originally Posted by markweatherill

I disagree with no.3, 'increasing tyre pressure'.

Because an increase in pressures can give a noticeable boost in mpg and while it does make a car handle differently it isn't lack of grip that does that.

Errrr, yes it does! By significantly increased the tire pressure, you are changing the contact patch of the tire. That leads to decreased rolling resistance but also sacrifices traction. If done smartly it can be manageable; but like everything else in life it's a trade-off.

Quote:

Originally Posted by detroiter

I disagree with the air filter one. Driving with a clogged air filter doesn't change fuel economy because of the OBD? That's like saying I can run a marthon in my shoes without soles just because I have laces still.

Errrrrr....again, the car "adjusts" to the decreased airflow, but even with a very dirty filter it is minimal at best and still doesn't restrict airflow as much as it does allow crap going down the intake that you don't want there!

Honestly, do you notice some increase in gas mileage when you put in a new air filter? I never have, with this car or any other. It just makes good sense to replace it to keep the crap that it filters from getting into the engine.

The air conditioning one makes sense as well, the aerodynamics are greatly affected at speed with the windows down. At slower speeds it's not as bad, but on the highway at constant speeds it makes more sense to roll up the windows and use the a/c. In town with stop-and-go traffic, it will significantly decrease your gas mileage; but that's usually when most people want/need it!

Cheers! M2

Kaotic Lazagna · 03-07-2011, 06:29 PM

I'm just going to say a few things.

I have a SGII, and when I turn on the AC on the freeway, I take a 10 mpg hit. If I open either front windows or both, I do not see any mpg differences, so for the Yaris, AC does matter.

As for the tire pressure, I'll let you guys read this: http://www.officer.com/article/artic...on=19&id=27281

Clogged air filter? Since it'll reduce performance, people are going to mash on their gas more, so it'll cause a decrease in mpg, even if the ECU tries to compensate for a dirty filter.

03-07-2011, 05:05 PM	#1
detroiter Drives: 2008 Polar White LB Auto Join Date: Oct 2008 Location: Metro Detroit Posts: 1,238	I disagree with the air filter one. Driving with a clogged air filter doesn't change fuel economy because of the OBD? That's like saying I can run a marthon in my shoes without soles just because I have laces still. __________________ I live my life a quarter pounder at a time. And for those 500 calories or more, I'm free. I need FRIES! Two of them. The big ones. Oh, and I need them tonight. You're lucky the double shot of BBQ sauce didn't blow the seam on your nugget box. There she is, 2 pounds of pure beef. My dad ate it in 9.0 seconds flat. Check it out, it's like this. If I lose, winner takes my happy meal. But if I win, I take the burger and the toy. To some people, that's more important.

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03-07-2011, 06:29 PM	#3
Kaotic Lazagna View User's Garage Drives: '14 GT86, '08 Vitz Join Date: Dec 2006 Location: Central Valley, CA Posts: 9,873	I'm just going to say a few things. I have a SGII, and when I turn on the AC on the freeway, I take a 10 mpg hit. If I open either front windows or both, I do not see any mpg differences, so for the Yaris, AC does matter. As for the tire pressure, I'll let you guys read this: http://www.officer.com/article/artic...on=19&id=27281 Clogged air filter? Since it'll reduce performance, people are going to mash on their gas more, so it'll cause a decrease in mpg, even if the ECU tries to compensate for a dirty filter.