Which engine oil is better for your Petrol Engine? Shell 10w40engine oil explained with grades

Aoa.hi guys..in this video we are discussing best mobil oil for your car petrol engine car according to engine oil grades.engine oils grades are very important factor for choosing best engine oil for your engine..in this episode we will Explaine Shell 10w40 engine oils with its specificification,quality standars and grades.at the end always choose geniune engine from a trusted shop & o and never choose fake engine oils.