2010 trx420fpa Should I stick with Honda oil and gear lube or go synthetic.

I have a 2010 Honda rancher at w Eps. I have done one oil change on it since I bought it using Honda oil and filters. I only use it around 3-4 times a year if i am lucky for a few hours each time. It is 6 years old now and i only have 80 hours on it and maybe 150 miles on it.
I was curious if I could use amsoil in the engine and front and rear differentials? I am a amsoil preferred customer so I get there oil at dealer cost and I use it in my motorcycle with no issues but I’m not sure how it will work with the auto transmission of my AT model. Will it cause any clutch slippage or do anything harmfull or be two slick (have to many feiction modifiers)for the clutch? Has anyone used amsoil in an AT model? Does it work? I am sure I can use it in the differentials with no issues. Thanks for the help.