 A newer version of bitumen-based fuel has replaced the original version with an alcohol-based surfactant, making it easier to transport the fuel and eliminating the health concerns associated with the phenol group of surfactants.The most well known bitumen-based fuel has been developed by Intevep, the Research and Development Affiliate of Petroleos de Venezuela SA (PDVSA), in a collaboration with BP, and is branded "Orimulsion.