dcBear78
New Member
We must have extra good fuel here in oz. Regular is 91 RON, premium is 95 and super-premium (98 RON) is becoming more common.
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Straight from the manual.
Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a pump octane number
[(R+M)/2] of 86 or higher, or a research
octane number of 91 or higher. If
knocking (or pinging) occurs, use a
gasoline of a different brand or premium unleaded fuel. Use of unleaded fuel
will extend spark plug life and reduce
maintenance costs.
So 86 is all thats required and regular gasoline is 87.
That disclaimer means: that if you use a lesser gas from the only game in town, use their premium. OR Use /change to a good recognized gas and not the cheapo stuff. I noticed a significant difference in gas quality in another state that had gas from "local sources". The test is whether your engine knocks with the fuel you normally use!
Nope, they are vented, and they take in moisture from the atmosphere as fuel is pumped out of them. Water contamination is fairly common. Water sits on the bottom of the tank until it is stirred up. Water being heavier then fuel will settle back to the bottom of the tank after the tank truck is done dumping fuel.I would assume the tanker trucks and the gas wells at a station should be a sealed container and when they are filling up the tanks, I would hope there isnt any "crud" at the bottom! Should be a closed cell system
He got it right, that is the test.The test is whether your engine knocks with the fuel you normally use!
As a side interest to this thread...and because it has been mentioned already, what brand of gas do you run?
For me # is Shell Premium and #2 for now is 76 Union Premium.
Anyone have other preferences and why?
I find I get the most HP with Shell 91 in any vehicle.
I stay away from Arco and Vallejo.
I still think bud-light taste better out of the glass bottle than those dumb plastic ones!