Same here, if I'm going to be distracted then I want it to be by what is happening outside the car. i have enough worries without adding more.
I have thought about getting an oil pressure sensor that has a higher rating, managed to find a supplier here in France to avoid the hassle/cost of importing from UK.
My petrol gauge only goes up to 3/4 with a full tank (it is on my list of things to look at, but . . .) but by the time the petrol is down to about 1/2 the gauge is accurate enough from there, plus i tend to fill up at 150 mile intervals anyway.