Hi Mike
Shell in Australia recently replaced their 98 octane unleaded with 100 octane, and are quickly phasing out the 98. i have run my zdz80 on 95 octane premium unleaded, but was going to change to the 98 as it is cleaner (better filtered) when it comes out of the pump. is it OK for me to run my zdz on 100 octane now that 98 is unavailable? any disadvantage to using 100 octane over 95 (apart from price)?
will i need to adjust the timing? thanks Jak