@ali980
Yes dear you can easily switch over to ZIC from shell with out any problem . for your Corolla GLI 2010 Model You can use
ZIC XQ (FULLY SYNTHETIIC OIL OF API GROUP IV), API SM, SAE 5W40
ZIC A+( FULLY SYNTHETIC OIL) API SM, SAE 5W20
ZIC A (FULLY SYNTHETIC OIL) API SM, SAE 10W40
If you can afford ZIC XQ then i shell recommend you to go with ZIC XQ because it life is atleast 20,000 km and it has d strongest molecular structer too.
for 96 GLI, use ZIC HIFLO , API SM, SAE 20W50
In Noshera city you can get original ZIC Brand Contact Mr. FAZAL (0300-5982992). ZIC DISTRIBUTOR
OUR SALES EXE. SAEEDUL REHMAN (0300-5926911).