Saudi Arabia's efforts to push oil prices higher have fallen flat with deep discounted oil sales by Russia to China. Russia has overtaken the Saudis as the largest supplier of oil to China. Saudi supplies to China have fallen to 14% of imports, while Russia's supplies to China have increased to 14%. China is building up inventory as a reserve capacity. Saudis cut production last month to push prices higher but prices haven't budged and stayed at about $75 a barrel. Russia is discounting by $26 a barrel and offsets the extra $6 it costs to ship Russian oil.