But 6yrs ago, the scientific consensus said that we only had 8yrs worth of oil left.
Can you tell us all where this was reported. It must have been reported widely after all, if it was "the scientific consensus"
Six years ago is 2003, so the critical date is 2003 plus 8 = 2011. Based on this, a Google search reveals predictions by a team from the University of Uppsala that oil supplies will peak soon after 2010 (New Scientist, 2003).
So possibly the original comment was simply confusing predictions of a peak in world oil flow with oil actually running out? Easy mistake to make.
p.s. I make no judgement on the premise of the linked article that "there is too little oil for global warming".