No pre-heating, most of my journeys are quite short, 2 mile round trip to my local shops, 10 mile round trip to see my son plus a few miles to take him shopping, lots of stop start in central Durham, 19 mile round trip to see my daughter.
Durham is pretty hilly so a lot of up and down and bendy roads and traffic. On the 2 miles down hill to the local bypass it can show 5.6 and about 4 when I get to my daughters but drops on the return as it’s mainly up hill. Sat doing around 50 in traffic on the A1 I’ve seen it creep up to 8!
In the summer I was getting an average of about 3.2.
Just checked the long term average, it’s 3.2 over 4500 miles – 9 months
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!