Trip Computer / Fuel Consumption Accuracy

[ResoKP]

Originally Posted by kaede

Possibly. Toronto definitely have more humid air than Vancouver. To top it off, temperature is also consistently hotter which makes oxygen level lower and combustion suffer. To compensate for that, it's only natural that the engine possibly dumps in more fuel? (I COULD BE TOTALLY WRONG THOUGH since i am no engine computer and management expert, please don't flame me >_<)

Base on that, cooler more oxygen dense and drier air should produce a better combustion which requires less fuel for the same/similar performance.

Also, i mentioned previously about fuel type too. Ethanol blended fuel is less energy dense and thus requires more fuel, try running gas without ethanol and you should notice an increase in fuel economy. Here on the West Coast we have Shell V-Power 91 Octane and Chevron 94 Octane that is ethanol free. I am guessing in Toronto it should be the same?

Cheers!

Honestly, I think the readings are just inaccurate. My plate sticker's up for renewal and realized that I only drove 3,000KM in the past 12 months.
I only drive this car for fun..
Something like 30L/100KM would be more accurate..

P.S. I only fill with Shell 91

[Helmsman]

Originally Posted by kaede

I can consistently hit 400km on a tank before the it drops before the "fuel up" warning stays on.

Warning comes up with around 15L remaining so would be 12.5/100km ish. Wow you Canadians are clever with the throttle! Always use Vpower 99, never come close. Might be becasue my car just loves to rev!

[ash4390]

Originally Posted by Helmsman

Warning comes up with around 15L remaining so would be 12.5/100km ish. Wow you Canadians are clever with the throttle! Always use Vpower 99, never come close. Might be becasue my car just loves to rev!

Haha I'd die for 400km. I'd be elated if I got 330km before the light came on!

[Helmsman]

Originally Posted by ash4390

Haha I'd die for 400km. I'd be elated if I got 330km before the light came on!

We must be doing something wrong mate...or not!

[kaede]

Originally Posted by Helmsman

We must be doing something wrong mate...or not!

hmmm now you guys are having me worried that SOMETHING is wrong with my car for having such low consumption figures.

I always have it in "Power" mode as soon as it warmed up. I never really feather the throttle unless i am quite stuck in traffic... maybe i just dont rev her up as much as you guys do on a regular basis.

[Helmsman]

Originally Posted by kaede

hmmm now you guys are having me worried that SOMETHING is wrong with my car for having such low consumption figures.

I always have it in "Power" mode as soon as it warmed up. I never really feather the throttle unless i am quite stuck in traffic... maybe i just dont rev her up as much as you guys do on a regular basis.

Ha, these days Im actually far from redlining everytime Im in the car, on the contrary Id say very moderate driving. Fuel consumption simply still there. On the other hand comfort is that she doesnt drink any oil what so ever so cant have a total drinking problem...

[Thik]

All highway, going around 120km/hr, the trip computer can show 10.2L/100km. The trip computer is consistently more optimistic by 0.8L/100km.

In 75% highway, 25% city, I average 12.4L/100km as per my mileage tracking app: Gascubby.

I still redline the car occasionally and take off pretty fast from stop lights. I just drive smart by never using the brakes. I keep a decent distance from the car in front of me and the engine braking the the M3 is pretty strong so I hardly ever have to brake in city or highway. Braking is what kills mileage.

[kaede]

Originally Posted by Helmsman

Ha, these days Im actually far from redlining everytime Im in the car, on the contrary Id say very moderate driving. Fuel consumption simply still there. On the other hand comfort is that she doesnt drink any oil what so ever so cant have a total drinking problem...

Sadly mine does have a oil drinking problem. Around 1L/5000km. That probably has something to do with running a lighter oil than the BMW recommended 10w60. Drank up M1 0w40 pretty quick. Right now I'm on 5W40 Motul 300V which slowed down the burning...

Fuel wise, i never really red line, i usually go 5-6k rpm and already have plenty of fun Plus, already going totally over speed limit lol

[bkdore]

My measured fuel economy is lower than the display. I have kept track of every fillup and odometer mileage for the first year of ownership. I reset the trip computer from time to time, but I drive fairly consistently to work and back, about 10 miles on the Interstate and about 10 miles in the city. My calculated MPG from the odometer and pump is around 13.5 MPG (US) The trip odometer usually shows around 14.5, so it's about 1 mpg optimistic. The best mileage I ever got was on a long interstate trip. My calculated mileage was 19.6 and the computer showed 22.4. Worst was track time where I had to do some estimating and it looked like I got around 9-10 mpg. My air filter is clean, and changing it didn't affect my mileage. I thought I'd notice a difference between summer driving with the A/C and winter driving without but it isn't significant to show up.

[Helmsman]

Originally Posted by kaede

Sadly mine does have a oil drinking problem. Around 1L/5000km. That probably has something to do with running a lighter oil than the BMW recommended 10w60. Drank up M1 0w40 pretty quick. Right now I'm on 5W40 Motul 300V which slowed down the burning...

Fuel wise, i never really red line, i usually go 5-6k rpm and already have plenty of fun Plus, already going totally over speed limit lol

In my book thats quite a bit of burning. What about going back to 10W60 and see what happens? (have trouble accepting BMWs acceptance level on oil consumption but thats only me)

[kaede]

Originally Posted by Helmsman

In my book thats quite a bit of burning. What about going back to 10W60 and see what happens? (have trouble accepting BMWs acceptance level on oil consumption but thats only me)

Actually just checked my little booklet (keep track of EVERYTHING i do to my cars), its more like a 1L top up every 7.5-10k km, so thats almost every OCI anyways. xD

Still... i envy those who always say their s65 dont burn a drop of oil lol