07 R12X manual says minimum 91. Will run on 86 but not over 5k rpm.
I live in California where the premium is 91 and regular is 87. Oxegynated to boot.
I'm going on houseboat for a week and you are not allowed to bring your own fuel.
They only have 87 available at the marina. Will I be OK or should I add a little Octane booster.