What grade of gas do you use?

[richw56]

Always 87 octane.
Never any problems.

[CheesyRider]

I was bored at work and found a owners manual online .pdf and it says:
Use unleaded petrol with a research octane number of 91 or higher.

I suspect the manual you found online was for an Australian F6B. Not sure why they have a different octane recommendation there. But, as flat6bagger mentioned, the US version specifies 86 octane minimum required.

I use 87 octane except for the last tank before winter storage. Around here I can only find ethanol free gas in premium. I prefer not to have ethanol sitting in the tank and fuel system all winter.

[hardtail]

Sometimes 87 but mostly 89 from Shell or Sunoco.

[dickiedeals]

Regular............Better gas mileage than with Premium......................Dickie

[Donncat]

Gents, I have always used premium on all 7 GWs. The dealer said when I picked up my 6B told me to also run premium "because 1800s run better on premium". Because of discussion here the last tank I bought was 89 rather than 93 premium and I got that cold hesitation I've heard about and a bunch of pop and crack when I rev on my custom exhaust. Didn't see difference in mileage but definitely a difference in performance. Can't explain it but rather just reporting the news. Sooooooo my next tank will be premium and all gas going forward. Just Sayin

[khahn]

Honda says use regular so I use regular.

[stevenolts]

What does your owners manual say? What does the service manual say?

I was bored at work and found a owners manual online .pdf and it says:
Use unleaded petrol with a research octane number of 91 or higher.

I have used nothing but 87 regular from mobile or shell if available up to this point. I swear the dealer said to use regular 87 gas. I have 9000 miles now and never a ping or a problem and she runs like a beast.
Steve

[Travelor]

The "Research Octane Number" (RON) is figured differently from the "standard" octane numbers and is generally for non-US use and runs about 4 points higher than the octane numbers used in the US. So RON 91 is equivalent to the regular gas 87 octane normally found at US pumps. You are wasting your money with anything higher than regular (87) unless you have modifications to the engine.

[moe113097]

my wallet runs better at 87 octane, and bike does not mind it

Moe

[rich]

my wallet runs better at 87 octane, and bike does not mind it

Moe

+1