So we made a huge mistake and took my dads sportsman in to get serviced at the local stealership.( Im the smart one and do my own service on my ex)lol. Anyway it took them literally a month and a half to get my dads quad back to us. Its a 05 sportsman 500 H.O. Then we found out that they put 20w50 weight oil in it. According to the manual we shouldnt run that heavy weight oil. Should we change it out or do you guys think it will be fine? dont want to fry a valve train or anything Thanks