oil warning light

[Phil TK]

. I keep the level topped up to just over the upper limit

I do that too, every oil change I start her up for 2 mins then stop the engine and leave the oil to settle then top it up to the high level and add a extra gloop or two until the level just fills the window. I have to confess I don't check it every day tho as the oil warning light tells me when it gets to just below the upper line. (only happened once in 40.000 odd miles)