So here is the stupid question of the day. I have a Bayou 300 4x2. I'm wanting to change the oil and diff fluids since I have not since I bought it back in the early spring. What types of fluids do I need to use? Is there a specific type or would any off the shelf 10w30 and 80w90 work? I am used to working on cars, trucks and mowers. This is my first ATV and I really don't want to F it up