Phil: Do you by any chance open a brand new 5-litre tin of oil every time you top up your engine and leave the rest in the can untouched on a random shelf?

Thanks for the link, I watched it live last week from your previous post but it's worth another view.
However (and I realise I risk coming across as a bit of an old curmudgeon here): you acknowledged my post last month that you had already created 5 of the existing 8 posts about this event and since then you've started 2 more!!

It's much easier to follow a discussion in a single place, rather than split into10 separate threads in different forum sections. Notice that in the menu bar above there is an
Active Threads link, could I suggest you try using that to access the forum to see what topics are current and add to existing threads when possible?
All the best.