I bought a new GMC Terrain with the 2.4 DI engine (my first DI engine). It seems I'll probably be driving around 10000 to 12000 km (7000 miles avg) a year. I will have four free oil changes in the first two years so the oil will changed out at around 6000 km (3700 miles). My question is what should I do after the two year period with this DI engine? I'm concerned about fuel dilution so even though one year OCI's seems logical, should I just keep up with 5-6000 km OCI's? What do you all think?