Any modern multigrade 10w40 or 15w40 should be sufficient. You can decide which make you want but they're all pretty much the sameness. You could probably pick up Castrol cheap from a motor spares shop (worth comparing prices).
As Jay says, look in the handbook. As you say it is a new car then you must have the handbook. The oil required should be specified by type natural or synthetic etc... and rating 10w30 etc.... and maybe a service rating. If you make sure that you buy oil with the same specs you will have no problems. However you can safely ignore any recommendation for a particular manufacturer as this is just down to marketing and sales rubbish.