320i F30 Fuel Consumption

[osiris]

3. I also expected consumption to be better while its cold in the morning but this makes very little difference in fact consumption is sometimes better in the afternoon than in the very cold morning.
:idea:

Your car is ignoring the laws of physics....The colder the air the more dense it is, thus more air goes into your cylinders at any given time as opposed to when the air outside is warm or hot...So naturally if more air is going in then the better the combustion, you will get better performance and at the same time if you drive the car at a constant 100 - 120kph you should see better consumption too. if not then your car is very confused.

This is not to say that your car will get better consumption when the engine is cold, that will definitly not be the case in fact it will be quite the opposite as the car over fuels when its not up to temp. But if the car is up to temp and the intercooler is being kept very cold then its definately going to up performance and lower consumption.

 

[skiet]

3. I also expected consumption to be better while its cold in the morning but this makes very little difference in fact consumption is sometimes better in the afternoon than in the very cold morning.
:idea:

Your car is ignoring the laws of physics....The colder the air the more dense it is, thus more air goes into your cylinders at any given time as opposed to when the air outside is warm or hot...So naturally if more air is going in then the better the combustion, you will get better performance and at the same time if you drive the car at a constant 100 - 120kph you should see better consumption too. if not then your car is very confused.

This is not to say that your car will get better consumption when the engine is cold, that will definitly not be the case in fact it will be quite the opposite as the car over fuels when its not up to temp. But if the car is up to temp and the intercooler is being kept very cold then its definately going to up performance and lower consumption.

Spot on, Reset your consumption reader once car is up to its operating temps when its cold and see from there.

 

[r0ckf1re]

I know its not an F30 but just some info. Best I got on my Audi 1.8T is 5.8
Had just over 1000km on the clock. Trip to Durban from JHB average speed 130/140 km's

Audi Claimed :
Fuel consumption urban (l/100km) 6.9
Fuel consumption extra urban (l/100km) 5.1

Would be awsome if it goes down to 5.1

 

[Philip Foglar]

As a matter of interest!

Shouldn't you be getting better figures see that you at the coast as to somebody that's in JHB for example?

The increased wind resistance due to the more dense air down at the coast is more of a penalty than the less dense air and the combustion process, and with a turbo engine this is cancelled out anyway since it compensates for the altitude difference by just working a bit harder the higher you go.

 

[petrivanzyl]

So after some more "scientific tests" it would still seem that the outside temp does not make a big difference on consumption.:fencelook:

Consumption is however worse while the engine is cold.


Consumption with cold engine cruising at 110km/h = 5l/100km



Consumption with cold engine cruising at 110km/h = just over 3l/100km

It took 19minutes both in the morning and in the afternoon for engine oil temp to get to 100C.



Consumption to work when it was between 9-12C = 4.4l/100km



Consumption back from work when it was between 26C = 4.1l/100km

:dunno:

 

[Cupra08]

So after some more "scientific tests" it would still seem that the outside temp does not make a big difference on consumption.:fencelook:

Consumption is however worse while the engine is cold.


Consumption with cold engine cruising at 110km/h = 5l/100km



Consumption with cold engine cruising at 110km/h = just over 3l/100km

It took 19minutes both in the morning and in the afternoon for engine oil temp to get to 100C.



Consumption to work when it was between 9-12C = 4.4l/100km



Consumption back from work when it was between 26C = 4.1l/100km

:dunno:

Thats impressive!

---

I thought that was an F30 320i but noticed its a 320d

 

[FerdiBotha]

We recently did a trip from Pretoria to Bloem in a F30 320d Auto. We left for Bloem with the odometer reading 1000km and left Bloem around the 1500km mark on the odometer. The speed was more or less the same (135-140km/h on cruise control). To Bloem the consumption was 7.1l/100 and back was 5.6l/100.

I definitely believe that the cars get better as they are being "run in".

 

[Andrew M325iS]

The claimed fuel consumption is based on EU specifications, they test the cars with the highest RON number in the EU which is 98 RON and here in SA we only have a maximum of 95 RON at the tanks, you can only buy 98 RON as an octane booster for racing etc. And when I research, it appears that the free way (out of town) driving is only tested up to 90km/h that is why on the eco pro settings when you set a speed limit warning above 90km/h it will not give you 100% efficiency. So that means their average is 50% town and 50% out of town (freeway) driving. So if you do 80% town driving or 130km/h on the freeway don't expect to achieve the claimed fuel consumption, only diesel cars tend to achieve and exceed those claimed figures, I try every day to achieve the average of 7.9l/100km claimed figures in my e90 325i lci, I get 9.7 l/100km with about 70% town driving but with my old 2006 b7 audi a4 2.0tdi I could get 5.6l/100l and the claimed was 5.8l/100km.

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