The danger signal, requiring production cutbacks, is more than six weeks.
Some oil industry analysts say that the coordinated production cutbacks of these countries have kept prices from falling even lower.
That is what set the stage for last year's production cutback.
Some analysts said the figures indicated there would be further production cutbacks this year.
Analysts said such combinations could lead to production cutbacks if they continued.
"The production cutback is due to a shortage of car buyers."
"But the market is weak and it's going to necessitate some further production cutbacks."
Auto sales are sagging, and production cutbacks may come soon.
After years of production cutbacks, demand for some steel products has risen recently.
The decline suggested that production cutbacks may not be needed to keep inventories under control.