2015 gem E4 what diff oil?

everyone has something different to say from you tube to a general search

Yea, almost anything will work.
I personally use 75/140 synthetic gear oil - Some use 90w

Avocado works great.

Plus, if you have an 00-04, when you hit phase 2, the carbbq, you can use it to cook lunch while you take turns driving the dozer