I haven't tried Amsoil yet, though the price and availability aren't bad. Perhaps someday down the road. I've never tried PP or PU (obviously, availability and price up here) or the latest Edge (at $13.99 a litre on closeout, I don't think so).
I haven't tried Red Line or any of the actual European brands either. I've seen Motul, but it's worse than Edge.
I've used a lot of MaxLife, but never had the chance to try VWB. That's mainly due to the timing of sales more than anything else. With their being no Ashland distributor around here and me tired of chasing Walmart's idiotic rollbacks, I'm unlikely to get the chance, either.
The other one I've had little chance to try are the Chevron and Havoline stuff. They have limited distribution up here, and much of their visibility is at Partsource. They're regular price is good, but they are too rarely rolled back. Oh, and I need to try Petro-Canada stuff yet; I have enough points I won't have to pay for any for a long time.
There's not much I would explicitly boycott (except those oils that would warrant a PQIA warning or are total unknowns and uncertified).
I haven't tried Red Line or any of the actual European brands either. I've seen Motul, but it's worse than Edge.

I've used a lot of MaxLife, but never had the chance to try VWB. That's mainly due to the timing of sales more than anything else. With their being no Ashland distributor around here and me tired of chasing Walmart's idiotic rollbacks, I'm unlikely to get the chance, either.
The other one I've had little chance to try are the Chevron and Havoline stuff. They have limited distribution up here, and much of their visibility is at Partsource. They're regular price is good, but they are too rarely rolled back. Oh, and I need to try Petro-Canada stuff yet; I have enough points I won't have to pay for any for a long time.
There's not much I would explicitly boycott (except those oils that would warrant a PQIA warning or are total unknowns and uncertified).