Unexpected Fuel Consumption Figures
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From: Chippenham, Wiltshire UK
My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
I have got about 31 mpg from my 530D Tourer almost since I bought it.
I have tended to use BP ultimate.
3,000 miles ago two things changed.
1. I put winter tyres on (Conti TS790v) instead of my GS D3's.
2. I started using Texaco Diesel, out of convenience.
MPG has improved over that time to 33mpg.
Same joiurneys to work etc.
Now winter tyres and colder weather should mean worse fuel economy right?
Maybe the Goodyears have a higher rolling resistance than the Conti's and/or Texaco Diesel is working better than BP Ultimate.
Wonder what will happen when the summers go back on (newPS2's)
I have tended to use BP ultimate.
3,000 miles ago two things changed.
1. I put winter tyres on (Conti TS790v) instead of my GS D3's.
2. I started using Texaco Diesel, out of convenience.
MPG has improved over that time to 33mpg.
Same joiurneys to work etc.
Now winter tyres and colder weather should mean worse fuel economy right?
Maybe the Goodyears have a higher rolling resistance than the Conti's and/or Texaco Diesel is working better than BP Ultimate.
Wonder what will happen when the summers go back on (newPS2's)
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Originally Posted by KAF' post='381640' date='Jan 22 2007, 11:29 AM
I have got about 31 mpg from my 530D Tourer almost since I bought it.
I have tended to use BP ultimate.
3,000 miles ago two things changed.
1. I put winter tyres on (Conti TS790v) instead of my GS D3's.
2. I started using Texaco Diesel, out of convenience.
MPG has improved over that time to 33mpg.
Same joiurneys to work etc.
Now winter tyres and colder weather should mean worse fuel economy right?
Maybe the Goodyears have a higher rolling resistance than the Conti's and/or Texaco Diesel is working better than BP Ultimate.
Wonder what will happen when the summers go back on (newPS2's)
I have tended to use BP ultimate.
3,000 miles ago two things changed.
1. I put winter tyres on (Conti TS790v) instead of my GS D3's.
2. I started using Texaco Diesel, out of convenience.
MPG has improved over that time to 33mpg.
Same joiurneys to work etc.
Now winter tyres and colder weather should mean worse fuel economy right?
Maybe the Goodyears have a higher rolling resistance than the Conti's and/or Texaco Diesel is working better than BP Ultimate.
Wonder what will happen when the summers go back on (newPS2's)
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From: UK
My Ride: Jan 2006 E63 650i Sport
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How many miles / km have you done? At certain points the engine frees up and returns better fuel consumption (according to my BMW dealer). Maybe you hit one of these trigger points in the engine management?
I personally cannot comment, as unfortunately I was born with a heavy right foot.
I personally cannot comment, as unfortunately I was born with a heavy right foot.
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From: expat in The Netherlands
My Ride: BMW 545iA Black Sapphire
Model Year: 2005
Engine: 545i
Originally Posted by KAF' post='381640' date='Jan 22 2007, 05:29 PM
Maybe the Goodyears have a higher rolling resistance than the Conti's and/or Texaco Diesel is working better than BP Ultimate.
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From: Chippenham, Wiltshire UK
My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
Originally Posted by xBMWx' post='381654' date='Jan 22 2007, 05:06 PM
How many miles / km have you done? At certain points the engine frees up and returns better fuel consumption (according to my BMW dealer). Maybe you hit one of these trigger points in the engine management?
I personally cannot comment, as unfortunately I was born with a heavy right foot.
I personally cannot comment, as unfortunately I was born with a heavy right foot.
Unlikely 28,000 to 31,000 miles
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From: Helsinki, Finland
My Ride: My ex-ride: EU '08 LCI 520dA. Space Grey, Sport Seats in Black Leather/Fabric Anthracite, Sport Steering Wheel, A/C with Extended Features, Hi-Fi Speakers, Cup Holders, Cruise with Braking function, Folding Rear Seats, Xenons, Park Distance Control.
Dear KAF,
Are your summertyres the same dimesion as your winter ones?
Wider tyres use more fuel, both the street contact, in my case 225 vs. 245,
and the wind impact makes, the similar changes for me.
If both are 225, your wintertyres just roll better. Maybe you have higher pressures in tyres?
I do not belive that the diesel fuel change has nothing to do with it.
Maybe you drive less aggressive now when it can be slippry.
Ususally cold wheather increasing the fuel comsuption, do to cold engines.
Are your summertyres the same dimesion as your winter ones?
Wider tyres use more fuel, both the street contact, in my case 225 vs. 245,
and the wind impact makes, the similar changes for me.
If both are 225, your wintertyres just roll better. Maybe you have higher pressures in tyres?
I do not belive that the diesel fuel change has nothing to do with it.
Maybe you drive less aggressive now when it can be slippry.
Ususally cold wheather increasing the fuel comsuption, do to cold engines.
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From: Essex, UK
Originally Posted by Ricracing' post='381730' date='Jan 22 2007, 07:44 PM
Ususally cold wheather increasing the fuel comsuption, do to cold engines.
So once you've warmed up the engine is less stressed?
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From: Helsinki, Finland
My Ride: My ex-ride: EU '08 LCI 520dA. Space Grey, Sport Seats in Black Leather/Fabric Anthracite, Sport Steering Wheel, A/C with Extended Features, Hi-Fi Speakers, Cup Holders, Cruise with Braking function, Folding Rear Seats, Xenons, Park Distance Control.
Originally Posted by colejl' post='381734' date='Jan 22 2007, 09:56 PM
True, but doesn't denser (colder) air produce more power? So once you've warmed up the engine is less stressed?
So once you've warmed up the engine is less stressed?Speaking of minus celsius.
But cold temperatures makes all oils stiffen, that needs energy to warm up.
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Contributors
Joined: Dec 2005
Posts: 1,261
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From: Chippenham, Wiltshire UK
My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
Originally Posted by Ricracing' post='381730' date='Jan 22 2007, 07:44 PM
Dear KAF,
Are your summertyres the same dimesion as your winter ones?
Wider tyres use more fuel, both the street contact, in my case 225 vs. 245,
and the wind impact makes, the similar changes for me.
If both are 225, your wintertyres just roll better. Maybe you have higher pressures in tyres?
I do not belive that the diesel fuel change has nothing to do with it.
Maybe you drive less aggressive now when it can be slippry.
Ususally cold wheather increasing the fuel comsuption, do to cold engines.
Are your summertyres the same dimesion as your winter ones?
Wider tyres use more fuel, both the street contact, in my case 225 vs. 245,
and the wind impact makes, the similar changes for me.
If both are 225, your wintertyres just roll better. Maybe you have higher pressures in tyres?
I do not belive that the diesel fuel change has nothing to do with it.
Maybe you drive less aggressive now when it can be slippry.
Ususally cold wheather increasing the fuel comsuption, do to cold engines.
Not that I am complaining !
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