Duraglo contains 9% E.D.L. (synthetic oil) and 6% castor oil plus up to 25% nitromethane and is the our best selling range of fuel. It exhibits many of the best qualities of both synthetic and castor, making it a very forgiving general purpose fuel. It is also particularly suited to installations where the engine is inadequately cooled e.g. some high powered helicopters, boats and buggies.