Fuel Consumption

[aaronng]

Also, L/100km numbers are more useful than kms per tank.

[EuroBro]

been cruzin on caltex 98 all the time. During summer avg 8.5. Now in winter 10.5. How can this be?

[terryansimon]

been cruzin on caltex 98 all the time. During summer avg 8.5. Now in winter 10.5. How can this be?

could be due to you using the heater more?

I dunno... random stab in the dark there.

[EuroBro]

could be due to you using the heater more?

I dunno... random stab in the dark there.

Maybe because of cold air / moisture (in very wet sydney) that it's not burning all the fuel quick enough??

[ok2]

As I understand it, this is because modern cars with computer controlled fuel injection (using sensors for O2, temperature etc.) maintain a more correct air/fuel mixture (Stoichiometric) than older cars. As cold air is denser more fuel is added. This gives you more power so you would think that if we accelerated at the same rate we would use the same amount of fuel but it does not seem to work that way.

If someone out there understands this better than me (I am no expert on this topic) and I am mistaken I would be happy to be corrected.

There may be other factors such as higher rolling resistance, cars taking longer to warm up (longer use of rich mixture) etc. but I think air/fuel mixture is the main reason.

[Euro76]

Don't worry mate. At first few thousand k's on odo it will consume more fuel and it's normal however when your engine is 5k km or above the consumption will get better and the car performs better. I was starting to feel the greatness of this engine the more I drive.

[aaronng]

As I understand it, this is because modern cars with computer controlled fuel injection (using sensors for O2, temperature etc.) maintain a more correct air/fuel mixture (Stoichiometric) than older cars. As cold air is denser more fuel is added. This gives you more power so you would think that if we accelerated at the same rate we would use the same amount of fuel but it does not seem to work that way.

If someone out there understands this better than me (I am no expert on this topic) and I am mistaken I would be happy to be corrected.

There may be other factors such as higher rolling resistance, cars taking longer to warm up (longer use of rich mixture) etc. but I think air/fuel mixture is the main reason.

That's right! Because cold air is denser and the engine takes longer to warm up. There are 2 reasons why the engine takes longer to warm up. First, because the engine is colder to start with. Second, the heater takes its heat from the coolant. So if you if you set your climate control to anything but LO on a 10ºC morning, you can bet that the heat from the coolant is going to be used for your heater. Since the coolant takes a longer time to warm up as well, the engine runs in cold start mode for longer.

[hotout]

[The car has best consumption on highway at 110km/h. =)[/QUOTE]

is this indicated 110 or GPS sorta 110? coz, my GPS shows 115 but dash shows 120.

[^__^ SM ^__^]

[The car has best consumption on highway at 110km/h. =)

is this indicated 110 or GPS sorta 110? coz, my GPS shows 115 but dash shows 120.[/QUOTE]

This is 110 on dash so probably 105 real speed ie. GPS

[tony1234]

Round the city i get approx.8.8-9.2L/100kms.BUT on the highway i've had it drop as low as 6.7L/100(in 6th.doing 110kph down to Canberra)

[falco]

I have averaged 8.4L / 100k over the last 4 years

[timmeh]

If I drive to Newcastle or Orange (regular destinations) I get 7.4L/100km. Driving around in Sydney I get 9.6. Not that I care anyway, I have a corporate fuel card.