Fuel Efficiency and the Yaris

[marcus]

wow......great lookin graph.. good job..atleast ur stats are more realistic..very close to mine...i just dont get how people getting 800km on a 37 liters...i think ill get bored hypermilling the whole time..

your dec 11th 2008 was a little weird seems not possible unless you kept ur engine running in neutral for a very long time.. plus it shows hwy.. you going 180km/hr the whole time??

[TT75]

Originally Posted by marcus

wow......great lookin graph.. good job..atleast ur stats are more realistic..very close to mine...i just dont get how people getting 800km on a 37 liters...i think ill get bored hypermilling the whole time..

your dec 11th 2008 was a little weird seems not possible unless you kept ur engine running in neutral for a very long time.. plus it shows hwy.. you going 180km/hr the whole time??

Thanks for your comments. I think it may be possible to run 800 km with 37 liters (37/8=4.6 lt/100km) if the car is Yaris D-4D (Diesel engine) and if it is going on highway. Beacuse, D-4D has a theoretical value of 4.5 lt/100km on highway. However, it is nearly impossible to get 4.6 lt/100km with 1.3 VVTi engine (gasoline).

The record on Dec 11th 2008 is for a long trip on highway. You are right that my speed was around 150-180 km/h for whole the trip. Actually, board computer says it is 7.9, but the calculation says it is 8.1 which is even higher :).

[marcus]

Originally Posted by TT75

Thanks for your comments. I think it may be possible to run 800 km with 37 liters (37/8=4.6 lt/100km) if the car is Yaris D-4D (Diesel engine) and if it is going on highway. Beacuse, D-4D has a theoretical value of 4.5 lt/100km on highway. However, it is nearly impossible to get 4.6 lt/100km with 1.3 VVTi engine (gasoline).

The record on Dec 11th 2008 is for a long trip on highway. You are right that my speed was around 150-180 km/h for whole the trip. Actually, board computer says it is 7.9, but the calculation says it is 8.1 which is even higher :).

i understand d-4d engine but that mpg is on 1.5 liter ..its someone in canada and we dont get 1.3 or d-4d engine in here so go figure...i dont get it..

[BailOut]

Originally Posted by marcus

i understand d-4d engine but that mpg is on 1.5 liter ..its someone in canada and we dont get 1.3 or d-4d engine in here so go figure...i dont get it..

marcus,

That is 497 miles on 9.774 gallons for 50.85 MPG. While it is certainly impressive it by far not the only 50+ MPG tank that Yaris owners with the 1.5L have achieved. I alone have 16 50+ tanks - some even after gaining carpoolers and having the crappier route that comes with them - as does voodoo22, and he even has the auto transmission!

As has been explained time and again, it all comes down to self discipline and attention to detail. If you want it it is yours for the taking.

[Woody_Woodchuck]

I also can see 50+ mpg US with the 1.5L gas Yaris. Mine just made its first “break-in jump” at 7,000miles and is getting about 2mpg better mileage with no driving adjustments. I look forward to spring/summer when I can hopefully join the 50+ club. Best winter tank so far was 47.77 mpg US for 281 miles driven.

I think terrain has as much to do with achievable MPG as driver ability or techniques. Someone with a flat or low rolling drive will get better mileage than someone in mountains or smaller steep hills. Also driving speed, I have had some fantastic mpg segments going 45 mph but can not do it regularly due to traffic. And then comes the driver. Getting over 45 mpg (at least for me) takes some work and dedication.

EDIT
The actual increase I have is:

First 19 tanks average 43.73 mpg US
Last 4 tanks average 46.47 mpg US
A 2.74 mpg increase.

The previous 4 tank average (before the sudden increase) was 44.79 mpg which gives a 1.68 mpg increase.