That is assuming the car was designed for premium. I think that if the manufacturer just calls for 87 octane, there is no benefit to using premium. Isn't that correct?
Don Snook -----Original Message----- From: Peter Frederick [mailto:psf...@earthlink.net] Sent: Wednesday, June 28, 2017 5:27 PM To: Mercedes Discussion List <mercedes@okiebenz.com> Subject: Re: [MBZ] Fuel Mileage Premium v. Regular Experiment Typically there is a knock sensor on the engine, and ignition timing is retarded when you get knock, may also richen the fuel. The difference can be 10% or more, depending on driving conditions and fuel, but usually it's cheaper to use premium. Peter _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
