Assalamualaikum seniors..
I recently bought suzuki cultus 2010 model car and about engine oil i asked it from the previous owner he previously use 20w40 shell in car but according to my limited knowledge 20w40 is not for winters and right now in Karachi the temperature is cold so i am confused which one to use 10w40 or 20W40 please recommend me with your valuable advice seniors!
and please recommend company also JazakAllah
