Modern cars have knock sensors that will adjust the timing on the fly, but there is a limit of how far it can adjust. If the timing is fully retarded and the engine still knocks damage could occur. Retarding the timing also retards engine performance.
Around here (LA) to go from regular to midgrade is .10/gallon and another.10 to go to premium. So you are saving .20/ gallon. Assuming a 20 gallon fill up you are saving $4.00. So save 4 bucks and you won’t get all of the performance you paid for. So if $4.00 is going to change your lifestyle may I suggest you sell your Benz (Audi, Porsche, Vette, etc.) and buy a Corolla. They run on 87.
Modern cars have knock sensors that will adjust the timing on the fly, but there is a limit of how far it can adjust. If the timing is fully retarded and the engine still knocks damage could occur. Retarding the timing also retards engine performance. Around here (LA) to go from regular to midgrade is .10/gallon and another.10 to go to premium. So you are saving .20/ gallon. Assuming a 20 gallon fill up you are saving $4.00. So save 4 bucks and you won’t get all of the performance you paid for. So if $4.00 is going to change your lifestyle may I suggest you sell your Benz (Audi, Porsche, Vette, etc.) and buy a Corolla. They run on 87.