Quote:
The US manual recommends 89 octane mid grade. I don't know what Triumph may have done for the Australian market.
Unless an engine is engineered for a higher octane fuel, the use of higher octane fuels is like throwing money out the exhaust pipe.
ZAKLY - All higher octane does is retard ignition, therefore minimizing 'ping' due to pre-ignition. Think of the octanes as a chain of little explosive balls in linked clusters. The higher the rating the more clusters, the more clusters, the longer it takes the cluster to fully 'ignite'. Octane levels were developed and are maintained to address higher compression engines, in which the fuel can and often does ignite before spark to to being compressed, therefore providing for maximum effectiveness (power) from the fuel. The exception (there's always one or more exception to everything  )In some cases of poor timing, higher octane can be used to compensate for the mis-match of the full compression of the fuel and the spark.
2004 Triumph Speedmaster (J Lo) 2006 Yamaha Stratoliner (Adele)
| 
