I was going to say "Rider Alert" but since it happened just now in my car as well, I went with Road User.
Eastbound only on 64th Ave at 180th St. Just on the east side of the intersection it's as slippery as goose snot. The Tuono spun up while accelerating mildly from the stop light yesterday and then the car did the same thing cruising through tonight.
The pavement is etched away, as if a lot of oil had been there for awhile so it's visually obvious. No sheen of oil visible even though it was raining both times.
Watch yourself going through.