Well, it was my first oil change after the purchase of city 2006, idsi.
So far,castrol magnatec 5w30 has been good overall. I cant compare n evaluate the performance as my car need some tuning n maintenance things to be done. about the oil, its api SN, ILSAC gf5, semi synthetic n uae imported, while castrol magnatec 10w40 is SN/CF, semi synthetic, marketed in pak,( thats here its confusing: its probably synthesized in uk (in pds there is mention of uk), it might have been brought n packaged by BP company in uae, then its marketed here, I dnt knw by whom but shopkeeper say they get it from muller & phillip ).
So, u might have any information regarding this as u r using it for so long, if u like to share.
Therfore,I have doubts about its authenticity.
Acha, phir uper se daal me kaala ye tha kay the shopkeeper I bought from, asked me to return the empty can of 5w30 n get 100rs. back. Now this has further put me in doubt as what do they do with empty can ( refill it?!!!)