It sounds like your favorite teachers gave you valuable and practical knowledge! I had no idea you worked in a mechanic's shop. Biodiesel was catching on here in the 1990s but due to the newer tailpipe emissions rules there aren't many diesel passenger vehicles left in America. It was amazing that cars could run on recycled cooking oil! I remember the emissions from these biodiesel vehicles smelling like french fries. Thanks for joining us again this week my friend! I appreciate it.