AoA,
I changed the engine oil of my mehran yesterday. I did not know much about this stuff so last time I used havoline 10w40. But this time I read posts on pakwheels and found that old cars should use 20w50. Now I have read your discussion and I don't know if my decision was right or not.
I have put havoline 20w50 in my mehran 2004 driven 60,000 km. Please guide me.