The car will need its service if the year margin is up,
ie. 20,000 or 2years. 30,000 or 3 years. 40,000 or 4 years, whichever comes first.
So if its done like 20,000 in its first year in which case it would need to have had 2 services.
But if its only done 4,000 in first year then wait till years up.
Get it ? Comprendi. ?