So today I came to my senses after over a decade rolling around in Clios and having the ever present luxury of a, for me anyway, reliable and accurate indicator on the dashboard of engine oil level every time they're fired up.
A pal on STOC PMd me asking if I'd ever had consumption issues as his had just had its 25k service, we do similar commutes and similar numbers of track days, and when drained his only had about 60% of its full capacity of oil.
So I checked mine and to my horror there was none visible on the dipstick! I then made sure the car was properly level, left it ten minutes after running then checked again and there was some showing, but it was well below the minimum level.
They hold 4.1 litres to the max level on the dipstick, and it took me just over a litre to get it back up to that level.
I do something on my car every single weekend, clean the outside or the inside or at least jet wash the wheels, and I without fail check and adjust the tyre pressures every single week. But I can't remember the last time I checked the oil. Idiot! From this day forwards it's part of my weekly routine.
If you have an ST, check your oil!