By coincidence, I've been researching this as well. Given my location (AZ) and driving style I'm leaning toward using Red Line MT-85.Need some recommendation on transmission fluid.
I used Amsoil severe gear 75-90 on all my other track cars and wonder if this would be ok for Veloster N when manual recommends 70w fluid.
While I certainly agree that what Hyundai advises is the place to start, what about adjustments made for your local climate? I assume what they advise is meant to be suitable for every climate they sell the car in, from northern Canada to the equator. That doesn't necessarily mean that it is the best for either of those extremes and may even be borderline at either one of them. While it may be great for a climate like Ohio or something.. hot in the summer, cold in the winter. But what about Miami, or Houston, where the last white Christmas was in like 1942? Would not a tweak say from 70W to 85W potentially be an improvement over the "balanced" approach, meant to be "suitable" for all climates, but tailored to none?What Hyundai advises.