Does this sound right? - Toyota Yaris Forums

2007yariz · 03-15-2012, 11:15 PM

Alright, so we know that the car accelerates faster downhill. Even faster depending on the degree of the hill.

I like to hold the gas pedal( just regular pressure) downhill and by the time i am close the the top, i will only need to gas a little bit, since the speed i gained downhill pushed me up.

I tried to let off gas when going downhill, but i gained speed slowly, and the engine had to work hard from bottom of the hill, as a result the RPMs will be high.

So if i speed up down hill( the engine doesn't have to work that hard since gravity helps it gain speed with low RPMs.

So low RPMs=Higher MPG (car doesn't have to work hard climbing a hill)

What do you think?

jhsouders · 03-16-2012, 12:36 AM

You're on the right track, I generally like to be in neutral down a hill unless its steep enough to DFCO. Once i get close to the bottom is when i give it some gas to speed up to whatever speed i want to go up the hill. The trick for mpg up a hill is to stay at a constant speed or even slightly decelerate (5mph max) to the top.

Once you're going up the hill, generally top gear will be best, unless it cant maintain the speed you want (and i mean with 50 TPS or less), then downshift.

Does this help?

2007yariz · 03-16-2012, 02:57 AM

Quote:

Originally Posted by jhsouders

You're on the right track, I generally like to be in neutral down a hill unless its steep enough to DFCO. Once i get close to the bottom is when i give it some gas to speed up to whatever speed i want to go up the hill. The trick for mpg up a hill is to stay at a constant speed or even slightly decelerate (5mph max) to the top.

Once you're going up the hill, generally top gear will be best, unless it cant the speed you want (and i mean with 50 TPS or less), then downshift.

Does this help?

Thank You. Good to know someone knows what i am talking about!

I drive an automatic BTW.

jhsouders · 03-16-2012, 05:17 PM

Do you have a Scangauge II or something similar to track mpg?

2007yariz · 03-16-2012, 10:55 PM

No i don't have a Scangauge II.

I am usually in a hurry when i drive(bad habit), and i like to keep my eyes on the road.

Sometimes i record my mileage when refueling to track my mpg.

03-15-2012, 11:15 PM	#1
2007yariz Drives: Yaris sedan Join Date: Jun 2010 Location: Northern Virginia (Fairfax, VA) Posts: 141	Does this sound right? Alright, so we know that the car accelerates faster downhill. Even faster depending on the degree of the hill. I like to hold the gas pedal( just regular pressure) downhill and by the time i am close the the top, i will only need to gas a little bit, since the speed i gained downhill pushed me up. I tried to let off gas when going downhill, but i gained speed slowly, and the engine had to work hard from bottom of the hill, as a result the RPMs will be high. So if i speed up down hill( the engine doesn't have to work that hard since gravity helps it gain speed with low RPMs. So low RPMs=Higher MPG (car doesn't have to work hard climbing a hill) What do you think?

03-16-2012, 12:36 AM	#2
jhsouders With the help of SGII View User's Garage Drives: 2009 Yaris Sedan Manual Join Date: May 2010 Location: Hillsboro OR Posts: 49	You're on the right track, I generally like to be in neutral down a hill unless its steep enough to DFCO. Once i get close to the bottom is when i give it some gas to speed up to whatever speed i want to go up the hill. The trick for mpg up a hill is to stay at a constant speed or even slightly decelerate (5mph max) to the top. Once you're going up the hill, generally top gear will be best, unless it cant maintain the speed you want (and i mean with 50 TPS or less), then downshift. Does this help? __________________ Last edited by jhsouders; 03-16-2012 at 05:16 PM.

03-16-2012, 05:17 PM	#4
jhsouders With the help of SGII View User's Garage Drives: 2009 Yaris Sedan Manual Join Date: May 2010 Location: Hillsboro OR Posts: 49	Do you have a Scangauge II or something similar to track mpg? __________________

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03-16-2012, 10:55 PM	#5
2007yariz Drives: Yaris sedan Join Date: Jun 2010 Location: Northern Virginia (Fairfax, VA) Posts: 141	No i don't have a Scangauge II. I am usually in a hurry when i drive(bad habit), and i like to keep my eyes on the road. Sometimes i record my mileage when refueling to track my mpg.