So I think an argument can be made for changing your oil sooner than 8k miles, and that's because a 2014 vehicle is still under warranty, and i don't know what the OCI stated in your owner manual is.
This is also why you shouldn't be using overly expensive oils in a new car. Because you many people wont do extended OCIs while under warranty, you don't get the value out of using expensive oils.
What's your reason for wanting to use the Sustina? I'm assuming you're thinking it's better for your vehicle and will make it last longer. My assumption is that people often come on here wanting the "best" oil because they think it'll make their vehicles last forever.
People seem to think that expensive motor oil is the fountain of youth for their car, but it's not. Yes, bad oil or not changing the oil will eventually mess up your car. But as long as the oil you use and the OCI are appropriate for your vehicle, then your engine will be just fine, and super expensive oil isn't going to extend its life any longer.
Also, I have never seen anything to indicate that using overly expensive oils over quality brand name oils would increase the life of the vehicle. Oh the manufacturers of the overly expensive oil will give reasons why their oil is the best, but I've never seen any real world uses that indicate it. In fact, I've seen countless examples of where a person used regular PYB, QS, Valvoline, etc with an appropriate OCI, and never had an oil related issue with the vehicle.
If you go get the $20 QSUD deal that's on sale right now, and slap on a Fram Ultra filter, your vehicle will last exactly as long as it will using the $60 oil. That's because vehicles usually come to an end because they either get wrecked, sold, rusted out, or non-oil related repairs become more expensive than the vehicle is worth.
I vote to change your oil at the recommended OCI in your manual, and use the recommended grade/viscosity oil. If you want to make sure you're using a quality oil, than use M1, PP, or any of the other "normal" priced synthetics that meet your vehicle's requirements.