Oil light switches are not normally a lot of money. I'd go for the jugular and replace.
I think the clue is in the journey time before the light comes on. If it was pressure related the bearings would be showing signs of distress before 80 miles.The car engine is up to its optimum running temp. Everything is baking under the bonnet causing expansion. So this could either be the switch or associated wiring so check connections running to the switch.
Last edited by: Fullchat on Thu 16 Aug 18 at 20:52
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