RAVENOL Extra Fuel Economy EFE SAE 0W-16 is a state-of-the art fully synthetic, smooth-running motor oil with CleanSynto® technology. Ravenol is the first company in the world to develop a lubricant to the new SAE category 0W-16 and obtain full API Approval. Especially recommended for hybrid vehicles or when the engine manufacturer recommends using a low viscosity oil with the viscosity category 0W-16, 0W-20 or 5W-20 with API SN Licence.