My local 76 station sells 100 octane fuel. Would this be better to run than the 91 octane I typically use?

 

It would be a waste of money, IMHO. Bike is set up to run on Super (91 or 93 cannot remember), anything more is not doing you any good.

 

Must be for off road racing, lots of that goes on down there

 

100 octane would burn better, cleaner. If its not that much more, use it. Fuzz

 

Don't really know, but I have run 87 octane in a pinch and didn't notice any difference.

 

If you are not experiencing detonation it won't make any measurable difference at all, and I think moving upward from the prescribed grade is wasting money, that is assuming the bike is running well to begin with--i.e. no detonation. Consumer Reports did some tests quite a while ago comparing different gas grades in cars and there was no difference moving to premium if the car was tuned for regular. I don't believe they tested any 100-octane gas, but I believe the effect would be the same, in both cases moving from the prescribed grade to something higher.

 

What do they get for the 100 octane in socal? In las vegas its $6.00/gallon. Run it in the white lighning in summer, 91 in winter. Good to know the bagger can run 87 in a pinch, I was riding rural NE Oregon and only finding diesel and 87 at places that weren't gas stations as we know them. Just a couple above ground tanks on a farm, or industrial type business near the road. Finally limped into a small town and found a Chevron station with 91.

 

I have at the station by me. Tried one gallon 100 and ~4.5 gallons 93, to get a mix near 95. I did not experience any extra power... Also, more octane probably needs more spark energy to burn the best...

 

Remember, higher octane lower BTU, but more fuel additives. You could run a low octane (higher BTU) , 87, and have a higher fuel mileage, but the engine will sound like crap(pinging, ...). Just run what the engine is set up for, you will be fine with others in a pinch.

 

The purpose of octane is to prevent detonation. Running higher than need octane value is a waste of money. The only benefit of running race type fuel is if you get the oxygenated fuel. Then you will need to tune for that. Oxygenated fuel is about $25 and up per gallon.