I was thinking about continuing 6 month services, at the end of warranty too. Professor's post is making me rethink.
Since 1990 or so all my cars have run once a year schedules - irrespective of the oil as long as it was API-SF (actually SG/SH in 1990) or higher. I do about 12,000 - 14,000km a year about 2/3 in the smaller car so do not hit the distance wall.
The following BHPian Thanks sgiitk for this useful post: