Fuel Efficiency and the Yaris - Toyota Yaris Forums

Yaris Newbie · 08-09-2007, 10:14 AM

So, here's a question from another post that got some response there but might be more suitable here. I was referred here anyway.

Regarding Driving under load.
In rolling hills, where coasting downhill is possible, but it is obvious that I will need to climb the next hill with at least some pressure on the accelerator... should I just forgo coasting down the hill and maintain constant pressure on the gas pedal the entire time (down and up the hill)?

Given these points already made:
Driving slower (to a point) increases gas mileage.
Moderate drafting (please no safety debate) increases gas mileage.

Would it be better to go 50-60 alone or to increase speed to 70 or slightly more to gain a draft off of a transfer truck (18 wheeler)?

At what speed should (the rare times I use AC) I roll up the windows and turn on the AC?

Will a cold air intake improve MPG?

Is there a difference in running the AC at a lower fan speed compared to higher temperature (more red on the circular dial) compared to turning the AC on for a while then off for a while? Or is the compressor doing the same amount of work in all three situations?

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08-09-2007, 10:14 AM	#10
Yaris Newbie Drives: 2007 Yaris Join Date: Jul 2007 Location: Tallahassee, FL Posts: 21	So, here's a question from another post that got some response there but might be more suitable here. I was referred here anyway. Regarding Driving under load. In rolling hills, where coasting downhill is possible, but it is obvious that I will need to climb the next hill with at least some pressure on the accelerator... should I just forgo coasting down the hill and maintain constant pressure on the gas pedal the entire time (down and up the hill)? Given these points already made: Driving slower (to a point) increases gas mileage. Moderate drafting (please no safety debate) increases gas mileage. Would it be better to go 50-60 alone or to increase speed to 70 or slightly more to gain a draft off of a transfer truck (18 wheeler)? At what speed should (the rare times I use AC) I roll up the windows and turn on the AC? Will a cold air intake improve MPG? Is there a difference in running the AC at a lower fan speed compared to higher temperature (more red on the circular dial) compared to turning the AC on for a while then off for a while? Or is the compressor doing the same amount of work in all three situations?