Fuel Economy

[Nigal]

Didn't see any real improvement in mileage after installing the Dragon intake. I got 40mpg this last tank with A/C on about 60% of the time. Still can't complain about that. :)

[RocknRollRon]

Originally Posted by Nigal

Didn't see any real improvement in mileage after installing the Dragon intake. I got 40mpg this last tank with A/C on about 60% of the time. Still can't complain about that. :)

I've gone about 5,300 miles so far (a mix of city highway- typical NJ driving). I've gotten 38.5 miles per gallon peak and total average is 37.5 mpgs...all with the A/C ON and my lead foot!

MT, regular 85 octane gas @ $3.80/gal

Hoping to get the TRD CAI and improve things a bit...

[Silver Streak S]

Will a cold air intake really increase fuel mileage? I've read different opinions on this.

[swng]

Brief follow up to Post #1376:
Got approx. 509.8 km (316.79 miles) with 35.787 liters (9.45 US gallons).
Translates roughly to 40.24 mpg (Imp), or 33.51 mpg (US), or 7.02 liters per 100 km.
Additional Info: Load = 2 people + some baggages most of the time. City/highway ratio was about 40/60. A/C used a lot during the tank. Tire pressure was 34 psi all around. Regular maintenance.
Comments: About average for me. Still comfortably above EPA numbers.

[stuffy]

nice work swng, i'm still a bit too much of a lead foot to get your numbers.....
but i'm close.

[nuarch]

i recently traveled from Miami, FL to Dallas, Tx
and recorded how much i filled up each time
and the mileage i had at next fill up

the car is a 4 door yaris sedan
trunk and back seat full of my life
and when i say back seat full, i meant from bottom
to almost the top of the windows
2 full size adults
and with a total trip of
1623 miles, i did a little side driving
i fueled 4 times and got an average of 39.6 mpg
there was a stretch through tallahassee, fl to port arthur, tx
that i got 43mpg
overall i was pleased with how well the car performed
and i feel sorry for its rear end, because with all the junk back there
any low dip that i was caught not paying attention to
gave me a nice reminder of how low it was back there

[swng]

Originally Posted by stuffy

nice work swng, i'm still a bit too much of a lead foot to get your numbers.....
but i'm close.

I am sure you will do really well sooner or later. You described youself as lead footed. I think there is a possibility of it being an overstatement. Even driving relatively fast can sometimes have good effects on F.E. Even if you do not pulse and glide (I rarely do), you can still accelerate a bit before a hill (subject to safety) and use the momentum to go up the hill. That will be a lot better than accelerating during the climb. Well, just an example to illustrate that going fast at the right moment can help save fuel. I by no means want to encourage speeding.
Good luck to all of us who make use of this thread to share experiences!

[swng]

Originally Posted by nuarch

i recently traveled from Miami, FL to Dallas, Tx
and recorded how much i filled up each time
and the mileage i had at next fill up

the car is a 4 door yaris sedan
trunk and back seat full of my life
and when i say back seat full, i meant from bottom
to almost the top of the windows
2 full size adults
and with a total trip of
1623 miles, i did a little side driving
i fueled 4 times and got an average of 39.6 mpg
there was a stretch through tallahassee, fl to port arthur, tx
that i got 43mpg
overall i was pleased with how well the car performed
and i feel sorry for its rear end, because with all the junk back there
any low dip that i was caught not paying attention to
gave me a nice reminder of how low it was back there

Nice numbers nuarch!
Just for some discussion, I believe for long trips over smooth road surfaces with few stops, load is often less harmful to fuel economy than other factors. What a heavy load (I mean one within safety limits) can usually do, apart from affecting your handling, is to cost you more fuel to reach the desired speed and more heavy braking to slow down/stop. Yet, the momentum caused by the load can actually help you maintain speed for a longer distance. This also means you can lift your foot from the throttle earlier whenever you want to slow down/stop.
Once you reach the cruising speed, friction of all kinds, including wind resistance, becomes the main factor adversely affecting your fuel economy. I venture to guess that your long trip must have been a smooth one (except the unexpected dips you mentioned) with few stops (relative to city driving), making your mpg numbers so adorable.
I envy you for having had the opportunity to travel such a long distance. I struggle with city traffic every day. Even my so called highway drivings are short and full of needs to slow down or stop.
Still, just like you, I am happy with my Yaris!
Thanks for your thought provoking report above!

[jdium]

Originally Posted by black2yaris

I did the TRD cold air induction on mine & right off got way more miles out of a tank ,plus way more pop off the line . With the reuseable / cleanable airfilter & added fuel savings it's gonna pay for it's self real soon

[swng]

Here is an article which I think is basically about fuel economy. IMO, it is not talking about new discoveries in this field. Yet it is comprehensive enough for day to day F.E. conscious driving purposes. One of the good things about it is it does give an estimate of how much fuel in terms of percentage a certain measure can help save: http://en.autos.sympatico.msn.ca/gui...mentid=4907539
Enjoy!

[voodoo22]

So far I'm loving the fuel mileage of the Yaris.

My first tank included a few hundred kms of country road driving at 80km/h with hardly any use of the a/c and got an incredible 4.9l/100km, on the second tank with almost 100% a/c use and much faster driving speeds quite often at 110km/h and we still got 5.6l/100km.

I can't see the car doing better after it breaks in, but if it does this FE could get amazing!

[Ah Yum]

Originally Posted by voodoo22

So far I'm loving the fuel mileage of the Yaris.

My first tank included a few hundred kms of country road driving at 80km/h with hardly any use of the a/c and got an incredible 4.9l/100km, on the second tank with almost 100% a/c use and much faster driving speeds quite often at 110km/h and we still got 5.6l/100km.

I can't see the car doing better after it breaks in, but if it does this FE could get amazing!

Wow that's really good. Congratulations.

[marcus]

Originally Posted by Ah Yum

Wow that's really good. Congratulations.

4.9 liter??.. this car should be between 5.5-6.9 l/100km how did you achieve that??

[voodoo22]

Originally Posted by marcus

4.9 liter??.. this car should be between 5.5-6.9 l/100km how did you achieve that??

I drove a long distance going 80-90km/h on country roads with no stopping. About 250 kms worth. I also have a 52km commute over the 401 and very rarely make short trips with the car.

It also included one 1 hr traffic jam getting out of Toronto though, but I go easy on the gas, basically never brake and the a/c was used very rarely.

I did inflate the tires to 40psi as soon as I got the car, but that's the only thing I do besides taking it easy on accelerating. Every day I see people fly by me only for me to pass them later as they're stuck in a slow moving lane, so I don't have the desire to punch the gas any longer and I think that's the biggest contributor to this result. Slow acceleration and consistent speeds.

I am aware there are errors with any fuel mileage calculations, but I did drive 707 kms before I filled up with just over 34 litres I think it was, so error rate should be somewhat low.

I was shocked to get 4.9, but some people get less than that consistently, like Bailout.

[palsan]

Originally Posted by voodoo22

I also have a 52km commute over the 401 and very rarely make short trips with the car. ... but I did drive 707 kms before I filled up with just over 34 litres I think it was

Your location shows "Toronto", so in order to get that kind of FE on the 401, either your commute is at 2am or you weigh less than 10lbs or both

The 401 is one of the most conjested highways in North America with average speeds during rush hour of >40km/hr. I can't believe that any driver of average weight can achieve 4.9L/100Km driving the 401 during the day

My Yaris is automatic, I commute from Markham to Toronto daily (40Km), my tires are at 42psi, I'm slower than 75% of cars, accelerate slowly from stops, I coast down hills whenever I can (my faves are leslie southbound and bayview south @ pottery rd), limit my use of ac, there is no extra weight in the car, coast to all red lights and stops, I only take one short 10Km trip each week to grocery shop, I don't idle, I don't warm up the engine in the morning, etc.

YET my best FE ever was 5.9 (575km on 34L). Your 707Km on 34L is 23% better than that. Either I'm missing some voodoo driving secret or, with all due respect, you're not telling us all the facts.

[Ah Yum]

Originally Posted by marcus

4.9 liter??.. this car should be between 5.5-6.9 l/100km how did you achieve that??

My best tank is also 4.9, to and from the Sea-to-Sky Highway with two passengers, speeds ranging from 30 to 80 km/h, lots of crawling up slopes and riding down the other side with DFCO.

Now I'm consistently 5.2 in all city traffic.

[voodoo22]

Originally Posted by Ah Yum

Now I'm consistently 5.2 in all city traffic.

5.2 in city traffic is amazing. If I could get near that it would be awesome.

DFCO supposedly only works on autos in 3, so it's harder to use, but whenever I'm coasting below 80 I try it.

I wonder how the car will do for mileage in the winter around here.

[stuffy]

my mileage dropped off considerably for the past two winters, in fact i might actually get 10 mpg less in the winter than i do in the summer.

but the disclaimer is that most of my driving is short city trips, so in the winter the engine never has much of a chance to warm up.
but i have also noticed poorer mpg on the highway as well in the winter.