[kingkongjaffa]

A better idea is a car play compatible app that you can type your car into and the mileage and it can send you reminders when you reach a certain mileage that things need doing.

Make it easy to know if my next service is a minor service or major service, or if i need to renew some thing that only needs changing every 3 services or that my tyres need checking or changing over to summer/winter tyres.

[lotsofpulp]

CarPlay protocol (at least the existing one that exists in almost all vehicles today) does not provide the phone access to that kind of information.

It just allows your phone to use a screen in your car as a second monitor, and output/input for audio. The only other input I think is whether or not headlights get turned on (to dim the display at night).