My oil warning light came on after 5000 miles - should I be concerned?

I bought a new Golf at the end of 2018 which I intend to keep long term. It drives very nicely but after 5000 miles the oil warning light came on, I topped up with synthetic 0/20 grade oil, about 500 ml and the light has gone off and all it's driving fine. Should I be concerned about some oil use during the first few thousand miles and should I consider a full oil change, especially in view of my intended long term ownership? If so Castrol is noted on the filler cap, so should I go for Shell Helix Ultra?
Do not mix oils. Only use the correct oil in the correct grade for the car. Volkswagen recommends Castrol EDGE Professional Longlife III 5W-30 and Longlife IV FE 0W-20. Yes, sometimes a new engine can use a bit of oil bedding in its piston rings. But keep an eye on it. Check the level every week. Change the oil and filter at least every year or every 10,000 miles whichever comes first.
Answered by Honest John on

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