First time I’ve seen a dealer turn down money.
Is it okay to switch my CX-50 to full synthetic 5w30?
5w30 is what’s in it now, it is just Mazda oil (whoever makes it). I think it may be a blend, but no one has comfirmed.
MazdaUSA on Twitter hasn’t replied to me in a year, so I will try here.
The weight of the oil is the most important. Stuck to 5w30 if that’s what the book says. Your car runs the exact same with both non and full synthetic, only difference if full synthetic doesn’t break down faster and has longer lasting detergents to clean and lubricate your engine for longer and hotter engine temps