Vancouver. Grandview highway between Rupert and Boundary going East bound. Middle lane looks like someone had an oil leak or fuel leak.
Touched it with my toe, it's slippery as fuck. Easy to see now, but later might be a bit harder. Braking on that will end up with you eating pavement.
Didnt see anything on the highway on ramp there, but a possibility, combined with construction crap, so be careful there as well.
Called VanPD non emerg line in case someone does bail there's a report on that shit.