What engine oil is best for my Toyota Innova?

Toyota Innova comes with both fuel options; petrol and diesel. And the car comes with two engine options; the diesel engine of the car is available in both BS III and BS IV emission norms. Synthetic engine oil 0W40 is best suited for both the Toyota Innova petrol and diesel variants. The synthetic engine oils do not need to be changed quite so often and make the engine frugal and sludge free.