I've been a short trip this a.m., and checked the level after 10 minutes at the destination. Level is 1/2 way between max & min. I will check again this p.m., after a longer journey and longer delay before checking. going back over my records from taking ownership, the first 12 months required 1/2 a litre at 5,983 miles. (Mileage on purchase, 19,285). This corresponds with a reasonable consumption > 10k miles/litre. That year was a mix of mainly short trips locally and several longer journeys to the south coast from Rochdale.
Last year, owing to covid, I only did 2,278 miles. So far this year, owing to my wife being unwell, I have done 2068 miles, most of that in the last couple of months, to and from hospitals.
The car is running well, returning exactly 50mpg on the 2nd screen, i.e., over about the last 1500 miles.
I don't think I have a problem after all - just confused by the low mileage since the plague, and not checking properly on a level surface.
The most useful information for me, (being a bit old school), is checking after a short drive and a 10 - 15 minute delay. Back in the 60s it was always advised to check before starting the engine, to ensure all the oil had drained into the sump. BUT the oil was much more viscous, and took a while to drain down. (Remember Duckham's 20-50?)