No. And no manufacturers recommend it either. The use of high-octane in an engine designed for regular unleaded is a waste of money. Conversely, the use of regular unleaded in a car designed for high-octane can cause the engine to knock and suffer damage. And under no circumstances should diesel fuel be used in a gas-operated vehicle (or gas in a diesel engine); if it happens, have the car towed to Tire Works and we will take care of it.