Don't use Local engine oil?

Auto engine needs oil.The oil plays key role in lubricating engine and its related components.When ever you replace oil.Go with correct oil,what your engine required.Many local garages or auto parts store will provide you cheaper oil .They do this for high profit margins.OEM oil is costly but there is no profit margin to earn in that oil.So they convince you to but this cheaper oil.Get the oil changed,BUT Use what the manufacturer recommends. Your engine is designed for a specific viscosity, and you need to adhere to the manufacturer's specifications. Nowadays, oil does much more than 'lubricate the engine'. The oil moves the variable valve timing, and a host of other tasks.
Viscosity is important.
Too thin, too much volume. Too heavy, to little volume.

Using correct oil helps your vehicles engine to maintain itself and give better performance.