Thanks for the advice. The track itself i know like my own pocket. Just think its weird that a tire change is needed as they are just worn a few percent but I'll try that to. Is fuel preservation needed or is it a full power race?Try the circuit experience for this track first ( it shouldn't take more than 30mins to gold it ) as you receive important knowledge about track.
For the race, pit on 3rd lap, refresh tires and refuel for 3.2-3.5laps.