87 or 91 octane? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 29 Old 08-21-2014, 06:36 PM Thread Starter
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87 or 91 octane?

New guy here w/an '04 DL1000.
Been running 91 so far, although the owners manual says 87.
I'm usually stuck with 10% ethanol in it.
What do you run & why?
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post #2 of 29 Old 08-21-2014, 06:58 PM
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The same question has been asked dozens of times. Use 87 in North America unless your engine pings. If it pings, you're better off having your carbon deposits cleaned but going to a higher octane is a possibility. Using a higher octane than necessary to run without pinging is a waste of money octane wise.

For those worried about higher octane fuel having a better additive package, there are fuels tested to have a quality additive package in regular grade. Top Tier Gasoline

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
See https://www.stromtrooper.com/general...nicknames.html

Please vote in the poll on what Strom(s) you have at https://www.stromtrooper.com/informa...-you-have.html
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post #3 of 29 Old 08-21-2014, 08:35 PM Thread Starter
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87 or 91 octane fuel?

New guy here, '04 DL1000 all OEM mechanically.
Been running 91 w/10% ethanol but noticed the manual says 87.
What do you run & why?

Last edited by scootin1000; 08-21-2014 at 09:04 PM. Reason: More complete question info
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post #4 of 29 Old 08-21-2014, 09:00 PM
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It all depends on where you buy gas. In general I use 87 with 10% ethanol and get good results. There are however certain gas stations, with good customer traffic, where I get misfires with the 87 gas. Every 4th or 5th fill up I will use the next grade up (no real reason). I believe that the idea of using high grade gas because it is ethanol free is false. I live in Moncton, New Brunswick, Canada and the same tanker appears to deliver gas to different companies.

My 2009 Vee is 100% Suzuki. If you are using after market parts the above might not apply to you.

Ideas will differ,

Brian


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Originally Posted by scootin1000 View Post
New guy here, '04 DL1000.
Been running 91 w/10% ethanol but noticed the manual says 87.
What do you run & why?
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post #5 of 29 Old 08-22-2014, 01:24 AM
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If the bike is designed to run on 87 octane then run 87. If a vehicle is designed to run with a higher octane, using a lower octane may result in pinging but more likely the EFI will retarded the ignition just enough to avoid pinging. The result is degraded performance as the throttle calls for more acceleration the EFI computer is attempting to slow the rate of acceleration. This wastes gas. Using the proper octane in vehicles that require the higher octane will deliver a slight increase in mpg that will more than offset the increased cost per gallon.
For example, my Goldwing requires 91 octane per the owners manual. It will run adequately on 87 octane. The mileage on 87 octane averages 42 mpg on the highway. Filling the tank with the recommended 91 octane will increase the mileage to nearly 46 mpg. The cost per mile is better with the higher cost gas so going cheap at the pump is detrimental in the long run. You bike is designed to run on 87 octane. The above increase in mileage will not be realized as the EFI computer is not trying to process conflicting inputs, it's running normally. Running 91 octane will result in unburned gas being pushed out the exhaust wasting gas and decreasing the mpg.

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04 GL1800A - Traxxion suspension
11 DL650 ABS white - Lowered, Risers, Richland Rick stuff, Sgt seat, Madstad
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post #6 of 29 Old 08-22-2014, 03:09 AM
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The Stroms do not have a knock sensor. The computer won't compensate.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
See https://www.stromtrooper.com/general...nicknames.html

Please vote in the poll on what Strom(s) you have at https://www.stromtrooper.com/informa...-you-have.html
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post #7 of 29 Old 08-22-2014, 06:22 AM
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Tier1 on the other hand
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post #8 of 29 Old 08-22-2014, 12:17 PM
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Octane number is just an indication of resistance to self ignition. Despite all allusions to the contrary by some gas companies, there usually is no difference between 87 octane and 91 octane other than that. So, using 91 octane doesn't necessarily get you a "cleaner" or "better" gasoline. If you have a high compression engine that requires high octane, the manufacturer will clearly state that. The DL1K runs very well on 87 octane. No need (or benefit) to use anything other than 87 octane unless you like giving your money away.

Gustavo
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post #9 of 29 Old 08-22-2014, 12:42 PM
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I'll be running 87 octane (100% gasoline) in my new DL650A. Fortunately, 100% gasoline is widely available in all 3 grades (87, 89, 91 octane) in my area. I know I have less trouble with 100% gasoline in my lawnmowers that sit for long periods of time without being started.

I believe the new DL1K's have a requirement for 91 octane fuel.
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post #10 of 29 Old 08-22-2014, 12:54 PM
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I have been putting 94 ethanol free gas in my bike for years. Since i work from home full time now my bike tends to sit a lot more. Weeks at a time sometimes and i don't want Ethanol in there dragging in moisture. I also find my bike gets better mileage with 94 over the cheaper gas.

If they sold 87 ethanol free i would consider switching though but i guess those days are long gone.
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