I try to use 91 in my gen2 but it can be tough to find out on the road. Does anyone know if Mode C would be better if I have to burn 87 octane? Does Mode C change the timing favorably for lower octane?
Also, I think pinging usually happens when "lugging" an engine so I try to keep the rpms up by shifting differently if I run 87.
Always ran 87 in my old gen1.