New York Times | Lower Oil Prices Strike at Heart of Oil Sands Production New York Times OTTAWA — For as long as 400-ton dump trucks have been rumbling around the open pit mines of Canada's oil sands, crews from Kal Tire have been on hand to replace and repair their $70,000, 13-foot diameter tires. But the relationship, going back over a ... Oil matters until it doesn't, says Ottawa. That's not Alberta's view CANADA STOCKS-TSX climbs as energy shares jump with oil prices TSX surges as oil rallies for second day |