Any of you guys observing oil reduction issues with 1KRF engine in Vitz, Passo or any other, after 65K total driven, engine reduce 200 ml every 2,500 km and after 90K 200-400 ml every 1,000 km. I have more than 06 cars in my circle who are facing the same behavior after 65K and 90K, they are using 5W30, even used 5W40, 10W40, 20W50 , situation remains same, PCV changed, rest is good, what i assume, this is because of oil expander ring, which fail to function correctly (in full) in warm environment.
Any knowledge or solution to this, please comment guy, any of you reading this 