i have been using mobil 1 0W - 40 (fully synthetic engine oil) and though slightly pricier, its more worth it in the long run - capable of extreme weather conditions (from the very cold to the very hot - perfect for the weather in Delhi!) and i only need to change very, very seldom. speaking of which you guys should register and check this out! http://www.mobil1.co.in/willyoubetheone/ winners get to go to an all expenses trip to a F1 Grand Prix to be part of their pit crew! awesomeness!