High-temperature dispersant/detergent chemistry paralleling that is already standard for automotive applications is designed to keep fuel and injector systems clean, reducing exhaust emissions, improving fuel efficiency and lowering maintenance costs. Patented by BetzDearborn of the US, it was the most successful of several hundred potential additives tested recently by the US air force. KLM vice-president Michael Coumans said KLM’s decision to become the first commercial operator to use the additive underscored its commitment to sustainability and the environment. Even a relatively small gain in fuel efficiency could have a big impact globally, with the international airline industry under increasing pressure to curb its soaring greenhouse gas emissions.