Fuels and lubricants are the defining underpinnings of transportation.  They are literally what makes transportation move.  The more powerful, efficient, and clean these are, the more powerful, efficient, and clean transportation will be. There are many Energy Savers pages and tools to help consumers understand the vast array of fuels and lubricants available on the market, from those that are fossil fuel-based to those that are synthetic, those that are derived from biomass, and those catalyzed from basic elements with nothing but water as its by-product.