Whats your winter mpg

[sub39h]

Its more to do with the cold dense air... more air=more fuel= more power=less throttle less MPG

^hence why i never understood the above as an explanation

[swgti]

Mine only does a 8 mile windy trip most mornings to work and have noticed a drop from about 29 down to 27.

[Beddie]

Averaging 28 as usual through the winter compared to 32 in the warmer months which is to be expected really  

Longer on cold start / rich running due to cold temps
Tyre pressures drop in the cold increasing rolling resistance
Extra frictional losses due to all the fluids, oils and greases in the car becoming less viscous
Increased electrical load (heated seats, rear screen, lights etc) increasing the mpg
More aerodynamic drag on the car due to the increased density of the colder air

Winter sucks but cold dense air is officially turbocharger approved...  

[JoeDarKa]

I hit 72 mpg on the way to work today   

Thats a derv for you!

[alackofspeed]

Its more to do with the cold dense air... more air=more fuel= more power=less throttle less MPG

^hence why i never understood the above as an explanation

As I understand it, low temp fuel consumption is typically higher due to prolonged warm-up increasing the duration of cold temp enrichment, combined with poorer part throttle fuel atomisation when at normal water / oil temperature due to the lower air temp. Perhaps there are also very slightly increased pumping loses due to a marginally narrower throttle opening for a given crank torque / power. On top of that there are the other factors mentioned above - increased electrical load, mechanical friction losses, and other parasitic losses.

[Little_Dave]

Was shocked to get an average 33mpg on a 160mile round trip peaking at 39mpg for a while yesterday!!!  never seen it average above 30 before or seen figures over 34 at any speed lol

Dave

[Mk5 GTian]

I reckon I'm getting an average of about 29 at the moment, but that includes a lot of stop/start around suburbia. I'm gonna try turning the climate off once I'm demisted, and see if that makes a difference.

[NotNormal]

My average per tank has gone down to 33.6mpg .....

..... Not bad for a 3.0 twin turbo diesel 

[rich83]

My average per tank has gone down to 33.6mpg .....

..... Not bad for a 3.0 twin turbo diesel 

What car is that on? 123D?

[NotNormal]

What car is that on? 123D?

Nah, it's my 335d coupe .... 3.0 ..... The 123d is a 2.0 twin turbo 

[rich83]

What car is that on? 123D?

Nah, it's my 335d coupe .... 3.0 ..... The 123d is a 2.0 twin turbo 

Doh... of course it is. Thats pretty good MPG for that engine and power.