Real world fuel economy from new GE Jazz

[rossw]

I have a GE 1.5 VTi manual.

I get somewhere between 5.9 and 6.7 depending on where I go and how I drive.

I mostly use E10 or 91, but have tried 95 for a couple of tanks. My results from this are inconclusive so far, and I'm reluctant to spend the extra 13c/litre to find out based on the evidence I've seen so far.

I have had the airconditioning on most of that time.

I test drove a 1.3 auto and though the performance was OK, I doubt you'd improve much on the above figures because you need more right foot in the 1.3 to go places, especially with a load on.

If most of your driving is in the city and alone, the 1.3 makes a powerful argument given the price difference. It still matches the performance of most of it's competitor's 1.5s

[4thGenExi]

I have a GD3 ' 07 VTi and reset the trip meter every time I fill up. This in turn resets the instant fuel consumption back to zero. Should I be doing this, or will the computer become more accurate if I just leave it?

[rossw]

I have a GD3 ' 07 VTi and reset the trip meter every time I fill up. This in turn resets the instant fuel consumption back to zero. Should I be doing this, or will the computer become more accurate if I just leave it?

Did you mean average fuel consumption?

If you want to measure average consumption over the tankful then what you are doing is alright. If you want to measure the average over the life of the car, then don't touch it ever, but I don't think that would be all that useful.

You can also measure the average for a given journey by resetting the meter at the beginning.

[p.terribilis]

I get similar consumption to rossw. I drove to the Gold Coast and back yesterday and averaged 4.5L/100kms for highway driving and then later on when I reset it and drove through the city/suburbs I averaged 6.7L/100kms. However in really bad traffic I have gotten up to 8.2L/100kms. All in all I have only filled it once ( + the dealer's 1/4 of a tank) which I ended up going to 621kms before filling it up for the second time. I have a 09 VTI-S with paddle shifters and on I use them most of the time as I find it better for fuel economy.

[LSD GD3]

I have a GD3 ' 07 VTi and reset the trip meter every time I fill up. This in turn resets the instant fuel consumption back to zero. Should I be doing this, or will the computer become more accurate if I just leave it?

the way the Average fuel consumption is Measure by Distance(KM)/Fuel Consumed
Whats wrong with that is when you not moving (eg waiting for girl for 1hr out side her house) it is still using fuel. And that adds to the Average over all fuel consumption that’s why people get very very high reading! Specially people who turn aircon on and when car not moving it just adds up!

[rubyjazz]

My average is 9.5L/100km according to the computer.

Right now I'm averaging 8.3L/100km. Purely city driving. When I go to the freeway combined with my city driving - it goes down to 7.6L/100km.

I haven't had pure freeways so I can't tell unless I reset it. I think the sticker label I saw on the VTI is 6.6L/100km.

Hopefully, I can get that someday. Maybe when I drive to melbourne.

[dyljoy]

urs is auto? I got averaging 8.x L/100km right now when passed 8000km mark. the best ever result is around 7L/100km when most of freeway travel. I think 6.6L/100km is not easy to achieve especially by auto transmission. But time will tell...

[rossw]

the way the Average fuel consumption is Measure by Distance(KM)/Fuel Consumed
Whats wrong with that is when you not moving (eg waiting for girl for 1hr out side her house) it is still using fuel. And that adds to the Average over all fuel consumption that’s why people get very very high reading! Specially people who turn aircon on and when car not moving it just adds up!

Well, that's the same answer you get if you divide fill quantity by distance travelled, which is the normal way to judge fuel consumption.

I would suggest if you are waiting for someone, turn the engine off. Then your average will improve.

In the end, you are paying for the fuel whether the car is moving or not.

[LSD GD3]

Well, that's the same answer you get if you divide fill quantity by distance travelled, which is the normal way to judge fuel consumption.

I would suggest if you are waiting for someone, turn the engine off. Then your average will improve.

In the end, you are paying for the fuel whether the car is moving or not.

?My answer was already example of why you should turn the engine off ! anyways

but my point was these fuel consumptions things are just Average there are a lot of ways to help improve like (For Auto) put on neutral at the lights or traffic jams. it all adds up. my gd3 1.5(CVT) Average around 7.4 - 7.6Avg on Vortex / Vortex 98 on City Drive. i very very rare hit the 8.0Avg most of the time it hit 8.0avg is because of a bad batch of fuel (fuel quality are not consistence) and i drive a lot! and very consistence with where i go there for i know when the fuel are bad. had a few different types of bad ones. one time the fuel was so bad no matter how you step on it, it just don't move, and another time you can feel a lot of power but you can see the fuel meter drop very quick.

I try E10 before I find it gives more power then normal unleaded and gives a little better mileage around 7.6-7.8Avg for me!

a tip: changing intake and muffler helps. before I changed fuel consumption was 7.8-8.0avg (but not big barrel straight out canon muffler)

I know most of the manual people are in the low 6avg area, but I am a heavy foot driver so my avg are very high already.

O there are many many ways that effects your fuel consumptions. weather (hot / cold Days) going more up hill ( for small engine cars it make very very big different even small hills), loads fully loaded with people or goods.

[dyljoy]

Thanks for your hints, mate. I will try to use ur method to test my next tank, see how it can improve. anyway, my car is GE8 1.5L auto.

[redmugenjazz]

?My answer was already example of why you should turn the engine off ! anyways

but my point was these fuel consumptions things are just Average there are a lot of ways to help improve like (For Auto) put on neutral at the lights or traffic jams. it all adds up. my gd3 1.5(CVT) Average around 7.4 - 7.6Avg on Vortex / Vortex 98 on City Drive. i very very rare hit the 8.0Avg most of the time it hit 8.0avg is because of a bad batch of fuel (fuel quality are not consistence) and i drive a lot! and very consistence with where i go there for i know when the fuel are bad. had a few different types of bad ones. one time the fuel was so bad no matter how you step on it, it just don't move, and another time you can feel a lot of power but you can see the fuel meter drop very quick.

I try E10 before I find it gives more power then normal unleaded and gives a little better mileage around 7.6-7.8Avg for me!

a tip: changing intake and muffler helps. before I changed fuel consumption was 7.8-8.0avg (but not big barrel straight out canon muffler)

I know most of the manual people are in the low 6avg area, but I am a heavy foot driver so my avg are very high already.

O there are many many ways that effects your fuel consumptions. weather (hot / cold Days) going more up hill ( for small engine cars it make very very big different even small hills), loads fully loaded with people or goods.

intake n a nice twin loop will save u bout 1-1.5 litres per 100 kms, but when u floor it every now n then - watch the fuel meter drop!!

[rubyjazz]

urs is auto? I got averaging 8.x L/100km right now when passed 8000km mark. the best ever result is around 7L/100km when most of freeway travel. I think 6.6L/100km is not easy to achieve especially by auto transmission. But time will tell...

yes, it's auto/VTI-S. Did I hear it right? using paddle shifters results in lower fuel consumption? (p.terribilis) - wow 621 kms. Haven't even gotten to 400kms on a full tank.

Can someone post their intake/exhaust that gained them 1/1.5km i.e. twinloop? Is that both for 1.3/1.5L M/Auto versions?

E10 gives better fuel consumption/regular unleaded? Is that Caltex/Shell/whichever?