Apologies if you are across all forums and see this again ..trying to tap into all teh expertise i can

Hi all, got an S70 2.5 20v auto ..goes like a dream …sometimes !!

A while ago the oil light flickered on my route home, went off , I pulled into a garage and let it sit for 20 mins then check oil etc ..all good, water level all good, no milky residue etc

Stared it back up and it was fine..drove gingerly home and again it drove as it should.

Then a week or so later after daily use it flickered on , stayed on and when I pulled over I could hear the tappets ticking … as I started to pull off main road , the light went out and it stopped ticking and all normal

This hasn’t happened for a while now but did again tonight ….light on, tappet sound then out and quiet and smooth. No ticking or knocking from cold start up either …anyone had this or could give a suggestion what it is

Again oil levels fine but one thing I noticed around the first couple of times was bubbles in the oil on cap . ..normal in the engine as I peered in ?