Hi Jerby,
I use Mobil 1 ESP Formula 5W30 in my Mazda 6 gen 2 2.2 TD as it's rated JASO DL-1 which is what Mazda recommend. I've been using this oil for the past two oil changes (about 25000 miles) and so far so good. Mobil recommend this oil for this particular vehicle also. Just make sure you use the ESP Formula version in 5W30
I've always trusted Mobil oils and never had an issue with any of them whether it be for engine, transmission, diff, you name it, including in several four wheel drives that were driven quite hard.
Hope this helps,
cheers,
Froggy.