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The service manual for my 2009 WR250F specifies 95 octane gas. All of the pumps around me stop at 93 octane. A local dealer sells a bunch of different types of canned race gas but none of the damn things say what octane they are---just some model number. So, how is 95 octane gas sold? Do I need to keep looking for a gas station with a pump or is it available in the can? Or is Yamaha just making up "95"?

FYI, I always just used pump 93 for my air-cooled XRs and DRs. This stuff is new to me. 

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6 hours ago, TY REX said:

The service manual for my 2009 WR250F specifies 95 octane gas. All of the pumps around me stop at 93 octane. A local dealer sells a bunch of different types of canned race gas but none of the damn things say what octane they are---just some model number. So, how is 95 octane gas sold? Do I need to keep looking for a gas station with a pump or is it available in the can? Or is Yamaha just making up "95"?

FYI, I always just used pump 93 for my air-cooled XRs and DRs. This stuff is new to me. 

Are u sure its stating US spec? In EU we have 95 and 98 octane. But its the same as your 91 and 93 octane i belive.

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They don’t use research octane number in North America, we use anti knock index or (R+M)/2. Anti knock numbers are typically 4-6 lower than RON numbers. Run 91 or 93 and your engine won’t knock, and you’ll be fine.

 

 

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Yep as others have mentioned,

the service manual states RON octane ratings which is common worldwide

but in north america the R+M/2 method is used.

 

95 RON = 91 R+M/2 

so you're fine using pump premium of 91 octane and over.

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