Winter MPG

[jaytee]

Our Crosstar mpg has gone from 60 to 50 approx during the last couple of months, is this just a weather issue, anyone getting same results?

[JB]

My Jazz when new showed m p g at 71 or 72 second year showed m p g at 64 or 68
falling to 57/58 this winter, come this Summer will expect to see 64 again, put it down to
using electric seats steering wheel heater lights,

[MRCLICKCLICK]

same

[ahavoja]

My MPG also goes down during winter. One of the main reasons for this must be the increased need for cabin heating to keep windows free from ice and fog. In cold weather the engine idles for longer to produce the cabin heat, burning more petrol.

[stani]

Dramatic difference. Spring/summer 3.9l. Now in winter 6.8l. It's not only because of the winter season but also because I only drive short distances in winter now.

[Nicksey]

Yes, same here.
70mpg in summer, down to around 55/60mpg now because of heater/seat and steering wheel heat. I have seen it drop as low as 45mpg in some instances.

[Kremmen]

With the hybrid engine running far more in the winter, the mpg drop will be more noticeable than a ICE car where the engine is running all the time

[FMIB]

Some of my short winter weather trips of 5 or 6 miles have seen consumption down into the low 30's, nothing to worry about.
Most cars, irrespective if its petrol, diesel or EV powered are less efficient in cold weather.

[Marco1979]

It is also due to higher air density (more air resistance) and stiffer tires (more rolling resistance).
You can limit the consumption by shutting off heating and only using heated seats. But only if visibility is not compromised.

[aphybrid]

See one of main posts - MPG for those interested.

My results on graph clearly shows winter effect and not at all unexpected, same as with any car regardless of fuel for all the reasons stated.

Been a while since last fill, knee replacement reduced running.

Swap Thursday to new Crosstar in Sage Green, interesting to see if increased HP tempts using it and then a difference

[Sean Regan]

I think it's more about how you drive.
I usually don't drive my 23reg  Crosstar I bought a year ago, very far. Just local shopping a few times a week and visits to my golf club, six miles away, up to three times a week.
Consequently, when it's cold, the engine is required to provide for the heating system. So given the short journeys I do, it's on for most of the time.  It's also on when I let it sit on my drive with it running, if the windscreen needs de-icing before I set off.
Currently, I'm getting just over 40mpg. I'm not bothered, for 27 years I had CRVs where with this sort of motoring, the cars returned about 23mpg.

[Karoq]

I agree with winter increasing consumption. I know mine is EV, but JAzzs also have traction battery and they DO NOT like cold weather.
In summer I can get around 313 miles at 100% charge. Yesterday It only managed  238 miles @100%.

[John Ratsey]

Cold engines are very inefficient and cold weather makes this worse as it takes longer for the engine to reach an efficient operating temperature, not helped by the cabin heating system sucking heat from the engine. Then add the accessories using more energy. A good illustration of the cold engine effect is to select the Trip option on the big screen and show the current trip. In cold weather the trip mpg may start at around 30 and gradually creep upwards the further you go as the effect of the very poor starting mpg becomes a smaller proportion of the whole trip.

[Downsizer]

Last Saturday I drove 100 miles at 3 degrees C, mainly on dual carriageway and the car registered 54 mpg. Today I drove 180 miles at 10 degrees C on similar roads and the car showed 61 mpg. I think it’s all about cabin heating which keeps the engine running more.

[aphybrid]

I think the cabin heating comes from the engine, it is not electric, therefore at higher ambient engine does not have to run to give hot water to heater manifold whereas at low ambient it will run until set cabin temperature reached.