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Just curious, anybody ever use an octane higher (or lower) than 89? Any differences in operation or response?



I usually use the recommended 89 - However, I just ran two tank fulls of regular (87) through it and found no difference in either performance or mileage. I payed close attention for pinging and detected none. I'll try again in warm weather to see if there is any sign of pre-ignition. I suspect regular will work just fine. Conversely, I have also used 93 and also detected no difference. I lean strongly toward the notion that higher octane equates proportionatly to thinner wallets when there are no ignition problems.

2004 Triumph Speedmaster (J Lo) 2006 Yamaha Stratoliner (Adele)