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- Plano, Texas, USA
Yes, you can. But since there're also plenty of conventional and blend 5W-30 oil available, Mazda dealers will use them for oil change on these CX-9's like cubanomx's situation. Especially Mazda itself has an OEM Mazda 5W-30 oil which is not full synthetic, and dealers would claim it's the "approved" oil as it has Mazda's name on it!You can get 5W-30 in synthetic...