Aramco has given assurances that to use the lead-free fuel no adjustment is need to the engines of vehicles currently on the roads. The fuel will provide the same power and performance, and the octane rating of 95 will be maintained. Cars over five years old, however, would need special maintenance. By 2003, importers will be able to import vehicles equipped with chemical transformers, which contribute to curbing the negative impact of emissions on the environment.