When I was a kid, the local snowmobile shop used to sell 2T injection oil out of the 50 gal drum for a good discount. We always had a few washer fluid jugs full of it. I believe it was bombardier oil, so it was much cheaper than buying a jug and it was always cash of course, and he filled them up into your jugs.
I'd finish off the jugs every spring mixed into the dirt bike gas. He got some kind of deal on the drums as he raced 2T boats, so it was a bit of extra cash for him.