There is a BTU difference, but as someone said, the base stock of 80% matters. Generally, I am dismissive of worries about B20 because alot of the engine differences you now notice on B20 are a result of them being new, and the engine noises on dino that you think are "normal" are just what you've grown used to over the years. I would think based on B20's much higher lubricity that you will hear louder moans on the dino garbagio. As for Middle Eastern oil, the U.S. began curbing its Iraq imports, and middle eastern imports in about 2000. Some say (including Wolfowitz) that it's because the administration wanted to do what they are doing now (militarily) without major supply disruptions. Point is, expect increased Middle Eastern imports in next 4 years. Pee analogy accurate. Those oily bas#@rds would be out of business in a Texas minute without billions in taxpayer assistance. Let's give it to farmers and U.S, entrepreneurs to make biofuel, whether you believe in the infamous global warming or not!