A lot of people are talking about the WTI / Brent spread being backwards lately. But the contract specifications for "Light Sweet Crude Oil (WTI)" as it is called, is now listed as 0.42% sulfur. Whereas true "WTI" is a much higher grade at 0.24% sulfur. In the past there was a premium for WTI over Brent due to the low sulfur content of WTI and other factors in the specification. However, now what the exchanges call "Light Sweet Crude Oil (WTI)" has a spec with much lower quality than true "WTI". It is normal that this "Light Sweet Crude Oil (WTI)" should trade at a discount to Brent since it is lower quality. Am I missing something, or is this part of the reason for the so called WTI / Brent spread being backwards recently?