I assume you mean West Texas Intermediate as quoted on most news cast? Key factor between them is location.
WTI on the exchange means delivered to Land-Locked Cushing, Oklahoma with the existing pipeline bottle next to too many refineries. That was the reason for driving the price differential in the past few years.
Yes, I did mean WTI, and thanks for all the info about the pipeline situation. I had noticed the difference in prices when checking commodity prices and wondered why there was one.
Freepers are a fount of knowledge!