Sir, as we mentioned in the other thread, its really up to the owner what brand of synthetic oil you want to use. Just make sure you buy a synthetic oil for diesel engine use. Now the the grade, just refer to your owner's manual. Most strada owner's use Motol, but you can go with royal purple, petron, shell, caltex oil basta its for diesel engine and same grade/rating as what's indicated sa owner's manual. use 10w40; 15w40; pwede din 5w40