here we have a technical hitch bro. if i switch to fully synthetic, i wont be changing it for like 10k kilometers or something. rite ? but if i take it for 5k inspection, they would change the oil in it ANYWAY, so effectively my mobil 1 wud be totally wasted. if i dont take the car for the inspection, and later on something happens, they wont give me warranty as my car wud not have been maintained by them. so effectively, YES we are stuck till expiry of warranty period to use their own oil, which has a poor heat rating