Marvel mystery oil back in Canada
 

I see that MMO is now being sold at Walmart stores in Canada.
I mention this because it used to be sold at Canadian Tire and when they stopped I read somewhere that Mazda rotary engine owners got a petition going to get them to sell it again.
Apperently it is good for the seals on the rotors of these engines.

Oh, and that petition didn't work.

Can't you just buy it from somewhere else?

No, not in Canada. If you live near the border, you can go over to the US and buy it, but not if you live too far away from the border.