Recently I changed my passo's 2012 engine oil to zic x7 A+.because many people say it is the best oil out their in the local market..after using it for around 100km I noticed few things.stated as follow
1) the average km/l droped by 4 km/l from 22 to 17.6km/l with light foot.
2) cold start time increased by a minute or so.
3) over all lack in performance.
Let me assure you that the oil was 100% original and I always use original oil filter and changes air filter every time.so their is only 1 change the Zic X7 A+ oil.in my opinion it is a average oil with inflated price tag and exceptional market campaign and monopoly.i would recommenced all the passo users with 1KR engine to use any good branded oil with API 10W40.like helix,PSO carient havoline..in my view Eneos 10w40 from Nippon is the best oil available in Pakistan with a reasonable price tag.and you buy it with peace of mind that it is going to be the genuine product from japan, designed for JDMs, not some stupid cheap oil from Korea.
BTW before using ZIC I was using PSO carient 10w40 bought from pso i9 station and was getting an average of around 20 to 22 in city with light foot.