

Which engine oil to choose from?
So I have a Tiago and I get it serviced at local mechanic because frankly official service is a sham and expensive on top of it. The mechanic does a decent job however he puts this "Eni's i-sint" engine oil which is also fully synthetic. However recently noise in my engine and dashboard has increased and I want to try a new engine oil. Is Shell's Helix Extra HX8 a good option or should I go for something else? Please advise on it and or other option.
My mechanic also advised not to buy it online and I was indeed considering to buy it from Amazon (seller Kay Kay Enterprises)? Is that risky?
Thank you.