mpg dropping.. - Toyota Yaris Forums

marcus · 11-05-2010, 12:18 PM

by the same time this year im noticing dropped on mpg by at least 2mpg.. meticulously maintained.. dont know how im losing this much. summer 560km average on 7 bars now 510km, winter 530km now 490km on 36.5 liters.. whats up with this.

WeeYari · 11-05-2010, 12:19 PM

Two words, winter gas.

WeeYari · 11-05-2010, 12:26 PM

Can also add in the fact that it is now cold outside. Engine will be running higher rpms for a longer period of time until it warms up.

I think you've been around long enough to have seen past discussions on decreased fuel efficiency come this time of year.

hyprmiler · 11-05-2010, 02:04 PM

Yup I'm dropping in MPG here as well. Hate HATE HATE winter gas =(

Was 42 / 44 MPG depending on how I drove. I have to be a light foot now to just squeak out 40MPG (and I moved to premium gas due to thinking that it might still be summer blend, no such luck)

MUSKOKA800 · 11-05-2010, 03:42 PM

Colder intake air = richer fuel mixture (created by the ECU).

The plus is more ponies, the minus is more green to Big Gas, Queens Park and Parliment Hill. Try to appreciate the 'more ponies'.

nemelek · 11-05-2010, 04:26 PM

Winter can be hard on cars. The road salt and gravel on the finish. The sub zero starts. The drop in mileage doesn't help.

R2D2 · 11-05-2010, 06:11 PM

I'm in the same boat. 45-48 mpg all summer now getting 41-42 mpg.

MadMax · 11-05-2010, 10:47 PM

We've got winter gas here too, which doesn't make sense since our daily temps are still in the 70s...

marcus · 11-05-2010, 10:49 PM

guys im comparing winter previous year to this year.. not summer to winter.. even on sub zero i can still hit over 500km on 36 liters but now its on 8 plus degree and im doing 490 km late 3 tanks..i dont get it..everything is almost the same oh well... maybe time for a new car..lol.

MUSKOKA800 · 11-07-2010, 07:17 PM

Quote:

Originally Posted by marcus

guys im comparing winter previous year to this year.. not summer to winter.. even on sub zero i can still hit over 500km on 36 liters but now its on 8 plus degree and im doing 490 km late 3 tanks..i dont get it..everything is almost the same oh well... maybe time for a new car..lol.

You're likely squeezing the pedal slightly more than last winter.
Is your route identical? Traffic volume similar? Mod's the same as last fall?
Any number of things can effect your mileage.
And why is gas $1.074/L today?

It was $1.05 the last time I was in need. And $1.01 the time before that.

why? · 11-07-2010, 09:59 PM

there could be a dozen different reasons for the difference. Was a different type of gas legislated? Governments lately seem to enjoy playing with the gas formula. Is any of your cars fluids dirty? Did you buy new tires?

I assume you have some type of log, did you record specific weather and temperatures?

Did you add or subtract any mods?

marcus · 11-08-2010, 02:05 PM

this calculation is on stock rims.. same driving habits...im gonna check and might as well clean my intake sensor could be dirty or oily..

Bluevitz-rs · 11-08-2010, 08:48 PM

The gas could also be containing more ethanol than last year. Remember, most pumps say "Contains UP TO 10% Ethanol". So maybe they have 10% this year and only had 5% last year.

STC · 11-10-2010, 08:05 AM

Quote:

Originally Posted by Bluevitz-rs

The gas could also be containing more ethanol than last year. Remember, most pumps say "Contains UP TO 10% Ethanol". So maybe they have 10% this year and only had 5% last year.

That very much could be the case? It would be nice to find out who the distributor that gas stations buy from? I'm sure there are different % of ethanol from distributors. I know the gas station I use gets their gas from a reseller, Myers Oil, State College, PA who in return gets it from a distributor via the Altoona, PA pipeline. I asked and they don't know what the percentage of ethanol is contained in the mixture. Really how could you determine? I think you can't...

Any rate, the local mom and pop station still has some non-ethanol only 93 octane gas left. It will be gone by the end of the month...

Winter sucks and the gas too! At least, there will be the enjoyment of the upcoming Ski season...

Cheers!

Bluevitz-rs · 11-10-2010, 08:28 AM

Quote:

Originally Posted by STC

At least, there will be the enjoyment of the upcoming Ski season...

Cheers!

11-05-2010, 12:18 PM	#1
marcus toyota View User's Garage Drives: 2007 Yaris RS Blazed Join Date: Oct 2006 Location: toronto, canada Posts: 3,637	mpg dropping.. by the same time this year im noticing dropped on mpg by at least 2mpg.. meticulously maintained.. dont know how im losing this much. summer 560km average on 7 bars now 510km, winter 530km now 490km on 36.5 liters.. whats up with this.

11-05-2010, 12:19 PM	#2
WeeYari View User's Garage Drives: 06 Polar White 5dr, 13 Soul 4u Join Date: Oct 2008 Location: Georgetown, Ontario, Canada Posts: 5,740	Two words, winter gas. __________________

11-05-2010, 12:26 PM	#3
WeeYari View User's Garage Drives: 06 Polar White 5dr, 13 Soul 4u Join Date: Oct 2008 Location: Georgetown, Ontario, Canada Posts: 5,740	Can also add in the fact that it is now cold outside. Engine will be running higher rpms for a longer period of time until it warms up. I think you've been around long enough to have seen past discussions on decreased fuel efficiency come this time of year. __________________

11-05-2010, 03:42 PM	#5
MUSKOKA800 Drives: '08 Yaris Sedan, Aero Package Join Date: Oct 2008 Location: Burlington, Ontario, Canada Posts: 1,720	Colder intake air = richer fuel mixture (created by the ECU). The plus is more ponies, the minus is more green to Big Gas, Queens Park and Parliment Hill. Try to appreciate the 'more ponies'. __________________ TRD Upgrades: 18" Wheels wrapped in 215/35/18 PZero's, Sportivo Shocks/Struts, Lowering Springs, Swaybar, Axle-Back Exhaust, Oil Cap, Rad Cap, Signage. Aftermarket Goodies: Piggies SS, K&N Drop-In, Blitz S/C, DC Header, NST Pulley) Toyota Options/Accessories: Sport Pedal Covers, Sport Shift Knob, Ipod Interface, Summer Mats, Winter Mats, Cruise Control, Auto-Dim Mirror, Echo steelies with winter boots.

11-05-2010, 04:26 PM	#6
nemelek DWEED Drives: 3DR 2008 Metorite Metalic Join Date: Oct 2008 Location: Arizona Posts: 1,161	Winter can be hard on cars. The road salt and gravel on the finish. The sub zero starts. The drop in mileage doesn't help. __________________ Making a decision without following it with an action is still a fantasy.

11-05-2010, 02:04 PM	#4
hyprmiler It's cold in Wisconsin... Drives: 2008 and 2009 Yaris Sedans Join Date: Nov 2009 Location: Wisconsin Posts: 81	Yup I'm dropping in MPG here as well. Hate HATE HATE winter gas =( Was 42 / 44 MPG depending on how I drove. I have to be a light foot now to just squeak out 40MPG (and I moved to premium gas due to thinking that it might still be summer blend, no such luck)

11-05-2010, 06:11 PM	#7
R2D2 Crazy Oil Sniffer Drives: MM 09 Yaris 5 Dr LB "Click" Join Date: May 2009 Location: ME Posts: 498	I'm in the same boat. 45-48 mpg all summer now getting 41-42 mpg. __________________ "The howl was the sound of God’s casting pot, the morphing of my cells into shape, the forming of oceans out of molten premordial plasma. And I could feel it. I could cry for it. I could cry with it." -The Fitful One

11-05-2010, 10:47 PM	#8
MadMax Drives: 2008 Yaris Liftback (Sprocket) Join Date: Oct 2008 Location: San Antonio, Texas! Posts: 2,799	We've got winter gas here too, which doesn't make sense since our daily temps are still in the 70s... __________________

11-05-2010, 10:49 PM	#9
marcus toyota View User's Garage Drives: 2007 Yaris RS Blazed Join Date: Oct 2006 Location: toronto, canada Posts: 3,637	guys im comparing winter previous year to this year.. not summer to winter.. even on sub zero i can still hit over 500km on 36 liters but now its on 8 plus degree and im doing 490 km late 3 tanks..i dont get it..everything is almost the same oh well... maybe time for a new car..lol.

11-07-2010, 09:59 PM	#11
why? Only Happy When it Rains View User's Garage Drives: Yaris LB Join Date: Jan 2006 Location: harnett county NC Posts: 4,097	there could be a dozen different reasons for the difference. Was a different type of gas legislated? Governments lately seem to enjoy playing with the gas formula. Is any of your cars fluids dirty? Did you buy new tires? I assume you have some type of log, did you record specific weather and temperatures? Did you add or subtract any mods? __________________ Colin Chapman disciple

11-08-2010, 02:05 PM	#12
marcus toyota View User's Garage Drives: 2007 Yaris RS Blazed Join Date: Oct 2006 Location: toronto, canada Posts: 3,637	this calculation is on stock rims.. same driving habits...im gonna check and might as well clean my intake sensor could be dirty or oily..

11-08-2010, 08:48 PM	#13
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	The gas could also be containing more ethanol than last year. Remember, most pumps say "Contains UP TO 10% Ethanol". So maybe they have 10% this year and only had 5% last year.

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