My new car only done 5,800 miles and the other day going to doctors appointment it said on the dash, oil change needed in 15 fifteen days so i rang the dealer it should not be on yet so now booked in on Monday 9th September .
Some cars can by dynamic for servicing depending how they are driven, types of roads etc
Some models of modern cars actually sense the condition of some of the important components that may need servicing, Brakes are a classic example, but others can look at the engine and gearbox fluids, for things like the amount of conductive particulates, (bits of metal) light transmissivity and some other characteristics such as pressures across filters, and the Engine Management Systems can call for services, when one of or more of these sensor inputs begins to fall below an acceptable level.
One of the things that happens with brand new cars, is they do need to be treated with extra care in the first few hundred miles, as the mechanicals bed in. This why most cars used to (and some still do) call for an early oil change and service soon after sale. I know that some manufacturers no longer specify this first early service, but there can always be the odd car which does find some extra reason for an early service.
It's better to have it checked than to ignore it, incase it leads to excessive wear and a premature failure.