For decades, the standard benchmark for oil prices has been West Texas Intermediate (WTI). Historically, WTI has been priced at a premium relative to other feedstocks, such as Brent crude or OPEC crude.
Right now, WTI is cheaper than Brent crude by $8/$10 per barrel.
Composition of the different varieties is different, so refineries set up for OPEC oil can't handle WTI & vice versa. Sorta like putting mogas, or maybe even diesel, in your IO-360

.
If your avgas supplier's refinery uses Brent or OPEC crude, the price of WTI will be almost irrelevant to the price you pay at the pump.
http://www.energyscoutconnections.co...l-really-worth
http://www.ogj.com/display_article/3...spread-widens/
John Spivey