Fuel Efficiency and the Yaris - Page 13 - Toyota Yaris Forums

RickSWEF · 09-13-2012, 08:31 PM

Quote:

Originally Posted by vincentg

Does it make much difference if i gas up at night than throughout the day? and i heard from a good friend of mine that if you gas up notice that there are 2 - 3 types of levels in the nozzle of the gas pump. you only put in in the first level. (or the slowest pump) as to get more gasoline :) is this true? :)

I don't think it matters much what time of day you fill up. However, a slower pump will allow more air to escape your tank when filling up. Trapped air will cause the fuel to come up the filler tube and trigger the automatic shutoff on the pump nozzle. Some people think the tank is full when the nozzle clicks off and just puts the nozzle away without topping off. A slower pump will allow more fuel to enter the tank before the nozzle clicks off, so you end up with a fuller tank. If you're one who tops the tank off, none of this really matters much.

My '08 Yaris gets 36mpg during the winter months and 40mpg in the summer. I think the colder temps have something to do with this, but I also found out that gas stations have a summer fuel mix and a cheaper winter fuel mix. The different mixtures and the temps combined probably cause the difference in mpg. Of course, I'm not a slow poke when on the highway, so I could get better mpg if I tried.

charles nelson · 10-26-2012, 11:06 PM

Popular Mechanics Mag tested driving habits and mpg. They found that with an automatic transmission they got better mileage if they accelerated quickly but then tried to coast to a stop. Going faster more quickly put the transmission into the higher more efficient gears more quickly. Slow acceleration kept the cars in the lower mpg range longer.

STC · 10-27-2012, 07:44 AM

Quote:

Originally Posted by charles nelson

Popular Mechanics Mag tested driving habits and mpg. They found that with an automatic transmission they got better mileage if they accelerated quickly but then tried to coast to a stop. Going faster more quickly put the transmission into the higher more efficient gears more quickly. Slow acceleration kept the cars in the lower mpg range longer.

Not for manuals. You control your RPM shifts.

Cheers!

screenprintr · 11-21-2012, 08:10 PM

I'm really glad my Yaris gets 34 mpg semi around town and highway. However, I had stopping for gas every 3 or 4 days.

Why didn't they think about a slightly bigger tank? What's up with that?

matti · 11-21-2012, 08:29 PM

I also thought a bigger tank would be nice. Certainly not a deal breaker, though.

b20vteg · 11-23-2012, 12:10 AM

anyone notice lower mpg now that it's colder? why is that? :S

cmdjd · 11-23-2012, 12:13 PM

Quote:

Originally Posted by b20vteg

anyone notice lower mpg now that it's colder? why is that? :S

Richer fuel/air ratio until fully warmed.

cmdjd · 11-23-2012, 12:15 PM

Quote:

Originally Posted by screenprintr

I'm really glad my Yaris gets 34 mpg semi around town and highway. However, I had stopping for gas every 3 or 4 days.

Why didn't they think about a slightly bigger tank? What's up with that?

Bigger tank, more gallons, more weight, lower fuel economy when full.

2o6 · 11-23-2012, 07:14 PM

Quote:

Originally Posted by b20vteg

anyone notice lower mpg now that it's colder? why is that? :S

Depending on where you live, most gas stations have switched to a winter blend of gas, which burns quicker.

Amdkt7 · 03-07-2013, 04:47 PM

There are a lot of factors relating to poor economy in cold weather. Much of it is increased friction from lubricants, plus winter blend gas, and often colder operating engine temps. A hotter engine is usually more fuel efficient (not if the ECU is backing off timing to prevent knock).

tooter · 03-07-2013, 08:23 PM

Quote:

Originally Posted by b20vteg

anyone notice lower mpg now that it's colder? why is that? :S

I get exactly the same effect on my Yaris as with my motorcycle. The bike averages 66 in Winter and 70+ in the Summer.

I got my Yaris at the end of April which was mild Spring into hot summer weather and it's 2,000 mile average was 36.5 mpg.

Then I installed the tooter manifold and the next 1,100 hot Summer weather into milder Fall average was 38.3.

Now the latest 800 mile cold weather Winter average (also with the tooter) is 37.2.

So I can't wait for more than a year to pass so that I can get comparative mileage averages under similar seasonal weather conditions.

screenprintr · 04-09-2013, 08:27 PM

What happens when you turn on the Air conditioning? My car barely moved once I turned on the Air today. Yikes!

Amdkt7 · 04-09-2013, 08:36 PM

Huber Optic film, all the way around the glass. Did not need air today, I know in the past I would have! I did use air on a trip with a load of people (full car) because of the humidity. It did not hurt my mileage much. 38 mpg, 70 mph much of the trip.

peewee1 · 05-24-2013, 05:06 PM

I got tired of hypermiling, tired of the hard ride,tired of coasting down hills. So I lowered the air in my tires to 30 lbs, nolonger do any coasting. I just driver smarter and slower ( under 58 mph). No jack-rabbits and feather the gas pedal,and my mpg has gone from 36 to 41 mpg. The real answer to good mpg is TAKE IT EASY.

TLyttle · 06-29-2013, 02:43 PM

Bump. My Yaris is 6 years old now, so I thought I would do a FE check, pleasantly surprised at 5.1L/100km, city and highway. Even now, that is a nice number, and the fact that I have been getting that for all this time makes this a very efficient vehicle!

Amdkt7 · 06-29-2013, 06:02 PM

Some short trips, or trips with to many stop signs kills my mileage to the low 40's (mpg). Often get over 50 mpg on my trips to and from work. I sometimes can eek out 60 mpg. I use pulse and glide a lot. I have been experimenting with staying in lower gears while accelerating (up to 4k RPM), my trip average does not seem to suffer. Once I reach my target speed I'm in 5th, or coasting as soon as possible. So, it does not seem to matter much how you pulse, low rpm, or mid rpm, the overall mpg does not seem to be effected. The higher rpms gets you up to speed much faster even though the instant mpg is worse, the overall mpg is about the same. Otherwise, highest gear possible is the way to cruise.

When I bought the car I was only hoping for high 30's. What a great car!

charles nelson · 07-02-2013, 12:03 PM

Most modern cars get better mileage using AC with the windows closed at typical highway speeds. Slower...better mpg with the windows open and the AC off. At higher speeds, the open windows cause increased drag. Usually your car's velocity varies quite a lot at lower speeds...urban stop and go type. And the engine has to rev higher to speed up and run the A/C. So for best mpg, open windows at slower speeds and A/C when cruising down a highway.
At highway speeds and the windows open, I get a very loud low frequency thumping from air pulsing into the vehicle. With the windows closed, there is very little air noise. Noise is wasted energy. Some new cars now have air speed controlled louvers in front of the radiator to deflect and smooth the air flow over the front.

Amdkt7 · 07-02-2013, 01:48 PM

A lot of hyper-millers have found that AC on anytime is worse then having the windows down.

I coast down the same hill every day and have not been able to detect any difference in the coast with the windows up or down (though I usually only roll down one).

It may vary from car to car. Some cars may have a less efficient unit that really hogs the power.

11-23-2012, 12:10 AM	#222
b20vteg no show, no go :( Drives: 2012 yaris 3dr hb Join Date: Aug 2012 Location: maricopa, az Posts: 369	anyone notice lower mpg now that it's colder? why is that? :S __________________

05-24-2013, 05:06 PM	#230
peewee1 PEEWEE1 Drives: 2009 yaris s sedan Join Date: Apr 2013 Location: New York Posts: 55	M P G I got tired of hypermiling, tired of the hard ride,tired of coasting down hills. So I lowered the air in my tires to 30 lbs, nolonger do any coasting. I just driver smarter and slower ( under 58 mph). No jack-rabbits and feather the gas pedal,and my mpg has gone from 36 to 41 mpg. The real answer to good mpg is TAKE IT EASY.

07-02-2013, 12:03 PM	#233
charles nelson Drives: red Liftback Join Date: Aug 2007 Location: St Cloud Minnesota Posts: 68	Air Conditioning and MPG Most modern cars get better mileage using AC with the windows closed at typical highway speeds. Slower...better mpg with the windows open and the AC off. At higher speeds, the open windows cause increased drag. Usually your car's velocity varies quite a lot at lower speeds...urban stop and go type. And the engine has to rev higher to speed up and run the A/C. So for best mpg, open windows at slower speeds and A/C when cruising down a highway. At highway speeds and the windows open, I get a very loud low frequency thumping from air pulsing into the vehicle. With the windows closed, there is very little air noise. Noise is wasted energy. Some new cars now have air speed controlled louvers in front of the radiator to deflect and smooth the air flow over the front. Last edited by charles nelson; 07-04-2013 at 07:20 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
NEWS: TOYOTA REVEALS ALL-NEW YARIS SEDAN AT 2006 LOS ANGELES AUTO SHOW	VitzBoy	General Yaris / Vitz Discussion	7	09-20-2023 07:50 AM
2007 Yaris Pricing Info !	YarisBueller	New YARIS Purchase Forum	104	06-24-2009 04:54 PM
Fuel Level Gauge Stuck ? - 2007 Yaris Sedan	kaboom	New YARIS Purchase Forum	9	05-15-2007 02:58 AM
Fuel consumption US Yaris vs. Canadian Yaris	Driver	Performance Modifications	8	10-29-2006 02:27 AM

10-26-2012, 11:06 PM	#218
charles nelson Drives: red Liftback Join Date: Aug 2007 Location: St Cloud Minnesota Posts: 68	Popular Mechanics Mag tested driving habits and mpg. They found that with an automatic transmission they got better mileage if they accelerated quickly but then tried to coast to a stop. Going faster more quickly put the transmission into the higher more efficient gears more quickly. Slow acceleration kept the cars in the lower mpg range longer.

11-21-2012, 08:10 PM	#220
screenprintr Drives: 2010 Toyota Yaris Join Date: Nov 2012 Location: New Jersey Posts: 213	I'm really glad my Yaris gets 34 mpg semi around town and highway. However, I had stopping for gas every 3 or 4 days. Why didn't they think about a slightly bigger tank? What's up with that?

11-21-2012, 08:29 PM	#221
matti Drives: 2017 Yaris L (5sp manual) Join Date: Jun 2012 Location: upper midwest Posts: 345	I also thought a bigger tank would be nice. Certainly not a deal breaker, though.

03-07-2013, 04:47 PM	#226
Amdkt7 Returning to Toyota Drives: 2013 L 3dr MT Join Date: Mar 2013 Location: Nashville, TN Posts: 154	There are a lot of factors relating to poor economy in cold weather. Much of it is increased friction from lubricants, plus winter blend gas, and often colder operating engine temps. A hotter engine is usually more fuel efficient (not if the ECU is backing off timing to prevent knock).

04-09-2013, 08:27 PM	#228
screenprintr Drives: 2010 Toyota Yaris Join Date: Nov 2012 Location: New Jersey Posts: 213	What happens when you turn on the Air conditioning? My car barely moved once I turned on the Air today. Yikes!

04-09-2013, 08:36 PM	#229
Amdkt7 Returning to Toyota Drives: 2013 L 3dr MT Join Date: Mar 2013 Location: Nashville, TN Posts: 154	Huber Optic film, all the way around the glass. Did not need air today, I know in the past I would have! I did use air on a trip with a load of people (full car) because of the humidity. It did not hurt my mileage much. 38 mpg, 70 mph much of the trip.

06-29-2013, 02:43 PM	#231
TLyttle Drives: 07 Yaris sedan Join Date: Jun 2007 Location: Keremeos BC Posts: 986	Bump. My Yaris is 6 years old now, so I thought I would do a FE check, pleasantly surprised at 5.1L/100km, city and highway. Even now, that is a nice number, and the fact that I have been getting that for all this time makes this a very efficient vehicle!

06-29-2013, 06:02 PM	#232
Amdkt7 Returning to Toyota Drives: 2013 L 3dr MT Join Date: Mar 2013 Location: Nashville, TN Posts: 154	Some short trips, or trips with to many stop signs kills my mileage to the low 40's (mpg). Often get over 50 mpg on my trips to and from work. I sometimes can eek out 60 mpg. I use pulse and glide a lot. I have been experimenting with staying in lower gears while accelerating (up to 4k RPM), my trip average does not seem to suffer. Once I reach my target speed I'm in 5th, or coasting as soon as possible. So, it does not seem to matter much how you pulse, low rpm, or mid rpm, the overall mpg does not seem to be effected. The higher rpms gets you up to speed much faster even though the instant mpg is worse, the overall mpg is about the same. Otherwise, highest gear possible is the way to cruise. When I bought the car I was only hoping for high 30's. What a great car!

07-02-2013, 01:48 PM	#234
Amdkt7 Returning to Toyota Drives: 2013 L 3dr MT Join Date: Mar 2013 Location: Nashville, TN Posts: 154	A lot of hyper-millers have found that AC on anytime is worse then having the windows down. I coast down the same hill every day and have not been able to detect any difference in the coast with the windows up or down (though I usually only roll down one). It may vary from car to car. Some cars may have a less efficient unit that really hogs the power.