I'm going to change the transmission fluid in my 2002 Polaris Sportsman 400 some time this week. Does anyone know if there are any substances for the Polaris AGL synthetic. Can I use Valvoline CVT full synthetic transmission fluid instead? I know about the AMSOIL 2000, but I don't know who sells AMSOIL as far as places like Advanced Auto. I also can't over to the dealer until the weekend, so if anyone knows alternatives at the big stores like Advanced Auto or Napa let me know. Thanks in advance.