Right from the horses mouth….  

After you sign saying you only use brp brand, you signed that right away. That's why I say it's not legal to do that.  I would have refused. Even Polaris dealers aren't doing that yet. 

BRP can not deny warranty because of oil brand used.     they can deny warranty Only if the oil used was not meeting minimum oil specifications.     Think about it.  If they could we would have to use only manufacturers brand oil in any vehicle or engine you buy.       

I didnt personally chat with Doug but i did have a quick chat Grayden and i got Jill Dunlop in the pisten bully for pictures. 

Trail doesn't go there any more. It stops at nafzinger road. I see people are using walking trail paths to access Baden. Not sure how long that last before  township installs barriers too. Club said no trails from nafzinger road to baden and over to new Dundee by ok tire. 3 kms missing that's why it's red. I emailed snow surfers about it a month ago and they said no trail this year and if people use it anyways it be gone for good.