Have a mechanic determine whether your engine is in tune and the emissions control system is functioning properly. If it is, then there are two courses of action.
- Use a gasoline with a higher antiknock index (AKI)
- Treat the gasoline with a bottle of Techron Concentrate Plus. If there are combustion chamber deposits in the engine, the treatment will reduce them, which, in turn, may lower the octane number requirement of the engine. This may decrease the engine’s tendency to knock until these deposits reform.