Ok guys , I think I am at the right place. I have a 2008 Liana dn the user manual suggests using SAE 20w50. I have been using Shell Helix blue since now. At 30,000 Kms, I put in ZIC A+. Seems to be a nice oil and the car revs more freely, but on hot days, like 42 degree Celsius, if I push the engine a bit, I get burning smell and unstable idle.
I will probably revert to Shell blue [20w50] as it never gave me any issues and seems to be the right choice according to the temperatures in Pakistan. Any comments/ experiences are welcome.
Peace