Heavy Oil Differential Narrows Slightly

* WCS for May delivery in Hardisty, Alberta, settled at $13.45 a barrel below WTI, according to brokerage CalRock, after closing at $13.60 a barrel below the benchmark on Thursday.

* Canadian heavy crude differentials have strengthened this month on news that the 600,000 barrel-per-day Trans Mountain pipeline expansion project is set to start operating on May 1.

* “We expect the start-up of TMX should eliminate apportionment on the pipeline systems and lead to refiners competing to buy heavy oil,” BMO Capital Markets analyst Randy Ollenberger said in a note to clients.

* BMO said the differential could fall below $10 a barrel, helped by the ramp up of the Pemex Dos Bocas refinery in Mexico boosting demand.

* Oil rose around 1% on geopolitical tensions in the Middle East but posted a weekly loss on a bearish world oil demand growth forecast from the International Energy Agency (IEA) and worries about slower U.S. interest rate cuts.