I use Madza OEM filter with Pennzoil Ultra Platinum 0W-20 every 8,000 km to 10,000 km.
I personally like the Pennzoil over the Idemitsu high moly oil but it's mostly due to being more available in my area.
I do think the Pennzoil is slightly better fuel economy wise and comes out cleaner than the high moly but this is probably a placebo than anything.
Absolutely always use mazda filter and the owners manual says use Castrol which the three local Mazda dealers use this I also go with it. Over 60k miles with oil changes anywhere between 3k-6k and still runs great.
Honestly I wouldn't have the guts to run it for that long. I run Pennzoil full synthetic with a Purolator boss filter and I still do changes every 5000 miles.
Pennzoil platinum high mileage full synthetic 5w-30. I work at a Toyota dealership and this is what we use and is recommended. It's flows well and has great wear protection. I used to use mobil 1 but this stuff is 10x better. If you do a little research it shows this stuff performs/flows better then most oils.
I use Castrol GTX 20W-50, same as what the manual calls for. I know the oils changed since then but the previous owner didn't care for the car properly so I feel like the detergents are necessary.
Everything I've found for my 2008 Rabbit 2.5L engine specifies Euro 5W/40. Although you can find it in several brands, the best price I've found is the Castrol Edge Euro 5W/40 at Walmart for the 5-quart jug.
Pennzoil euro platinum LX 0W30 is the only readily available one that has the fiat/API approvals for the engine, advance auto usually has in stock at most locations.
FWIW: I live in Maryland and use Castrol Syntec 5w-40 in my 2012 JSW 2.5. I usually buy the filter and plug/washer from the dealer because they have the best price and I don't have to wait or pay for shipping.
I use castrol in my 2014 cx5.
I'm partial to Pennzoil Platinum Ultra 5w-30 based on UOA's at Bitog and other internet sources...
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