8th Gen Civic - Concerns on fuel economy

[denot]

Would you mind telling me please how being winter effects fuel consumption? It is winter here as well & for the last 6 weeks (500 to 600km per week) i have used less than 7L/100km. Only fractionally but very consistant.

heater on all the time? QLD doesnt have as "wintery" as NSW or MELB... so I dunno if you need heater on in QLD...