First time usuing 91 Petro Canada , Had too needed gas, added Royal Purple Octane Booster. Meth 50/50 spray starting at 6psi to 19psi aprox. Proggressive spray. CM10 nozzle I believe. 2 pulls 3rd gear 2k rpm to 6k rpm. Felt like crazy timing pulls under load havent checked log yet. This map is not tuned for meth.