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When I owned a 400 I got 60 mpg US at the worst and 70 mpg US average, riding 2 up @ 55-60 mph. Higher speed Does cost you mileage.
This may sound odd, but I believe lower octane may be better for you. Higher octane is Not more powerful, but really requires more compression to fire. Higher performance engines require it because of detonation, (pre-ignition). The olny time you need to go to higher octane is if you are experincing pre-ignition or detonation. Usually associated with high temperatures.
Lower octane fuels I think are really more flammable than higher octane. I know lower octanes(87+) work better for me espically with colder temps.
This may sound odd, but I believe lower octane may be better for you. Higher octane is Not more powerful, but really requires more compression to fire. Higher performance engines require it because of detonation, (pre-ignition). The olny time you need to go to higher octane is if you are experincing pre-ignition or detonation. Usually associated with high temperatures.
Lower octane fuels I think are really more flammable than higher octane. I know lower octanes(87+) work better for me espically with colder temps.
