CALTEX company have different types of oil for petrol cars LIKE
CALTEX HAVOLIN C X T
CALTEX HAVOLIN FORMULA
CALTEX FULLY SYENTHATIC
but it`s depend on you what you can afford for your car i am using CALTEX HAVOLIN FORMULA since 1996 i am satisfied
if your car is burning oil that`s may be not your mobil oil fault check it propely
may be your oil pump is faulty your head gas kit is weak , what ever is it ?
but use always one good brand motor oil for your car