Any 0w20 will probably be fine, and there is actually a debate among Mazda fans about running 5w30 in a Skyactiv (I think you can, but 0w20 is fine and where I live it's very cold so thin oil is good) but, if you want a high moly oil like Mazda's OEM, there are some options.
First, there's Idemitsu Zepro EcoMedalist w/ Moly (yes, that's a mouthful) which is very similar to the Mazda OEM oil, if not the same. IIRC, Mazda OEM moly oil is manufactured by Idemitsu, so you know it will be good for your Mazda. Just make sure you get the version that is specifically labelled as having Moly, Idemitsu makes another oil called Zepro EcoMedalist which only has a normal amount. Yes, it's confusing. That said, the regular EcoMedalist would also work just fine, it just doesn't have as much moly.
Second would be Toyota Genuine Motor Oil. It actually has even more Moly than the Mazda/Idemitsu and is generally cheaper. It's good oil from all the testing I've seen of it. Sure, it says Toyota on the bottle, but it's made by ExxonMobil and the specs are good. You can get it online or at a Toyota dealership. It generally sells for $80-85 for a case of 12. I'd recommend this one, if you want a high moly oil, because it does everything the Mazda oil does, but cheaper.
Third, you can move into the boutique oils like Redline. They have tons of moly, but they're also very expensive. I don't think these are bad oils, by any means, but I also don't really see how they're worth the extra money. Up to you on that one.
All that said, seriously, you really don't need to worry that much. Just get oil from a reputable manufacturer and you'll be fine. I generally just buy what's on sale, or default to the cheaper synthetics like Castrol Magnatec and Quaker State Ultimate, both of which perform very well, if UOAs are to be believed. You will never notice a difference over the life of the car. I spend the extra on a better filter, which I view as more important.
First, there's Idemitsu Zepro EcoMedalist w/ Moly (yes, that's a mouthful) which is very similar to the Mazda OEM oil, if not the same. IIRC, Mazda OEM moly oil is manufactured by Idemitsu, so you know it will be good for your Mazda. Just make sure you get the version that is specifically labelled as having Moly, Idemitsu makes another oil called Zepro EcoMedalist which only has a normal amount. Yes, it's confusing. That said, the regular EcoMedalist would also work just fine, it just doesn't have as much moly.
Second would be Toyota Genuine Motor Oil. It actually has even more Moly than the Mazda/Idemitsu and is generally cheaper. It's good oil from all the testing I've seen of it. Sure, it says Toyota on the bottle, but it's made by ExxonMobil and the specs are good. You can get it online or at a Toyota dealership. It generally sells for $80-85 for a case of 12. I'd recommend this one, if you want a high moly oil, because it does everything the Mazda oil does, but cheaper.
Third, you can move into the boutique oils like Redline. They have tons of moly, but they're also very expensive. I don't think these are bad oils, by any means, but I also don't really see how they're worth the extra money. Up to you on that one.
All that said, seriously, you really don't need to worry that much. Just get oil from a reputable manufacturer and you'll be fine. I generally just buy what's on sale, or default to the cheaper synthetics like Castrol Magnatec and Quaker State Ultimate, both of which perform very well, if UOAs are to be believed. You will never notice a difference over the life of the car. I spend the extra on a better filter, which I view as more important.