HI Guys, OK I have a '86 560, Is this procedure for this year too? I thought that the timing was set at 14 degrees BTC? Does removing the resister brings it to 8 Degrees BTC. As far as fuel goes there must be 3 stickers or plates on my car that says to only use premium. 91 octane. Does this mean that I could use Mid grade 89 octane now and the car would be and run ok?