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post #1 of 13 (permalink) Old 03-21-2019, 12:02 PM Thread Starter
Couch Potato
 
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Octane Question

Just bought a used 2012 700 Sport Edition. In going through the owners manual, I found that I'm supposed to be running 91 octane in this. Is that really necessary?
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post #2 of 13 (permalink) Old 04-18-2019, 03:24 PM
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Same question for a 2006 (carbureted). I usually dump 87 in it but run rich at times and not very smooth.
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post #3 of 13 (permalink) Old 04-18-2019, 06:14 PM
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Quote:
Originally Posted by wkmarsh View Post
Just bought a used 2012 700 Sport Edition. In going through the owners manual, I found that I'm supposed to be running 91 octane in this. Is that really necessary?

Wow - that's news to me. I have a 2012 700 and I have never run anything but 87 - performance is good and no ping. If I knew that to be a requirement I guess I would have to upgrade to the higher octane but so far so good. Come to think of it I do occasionally run ethanol free which is 90 octane but that stuff now runs almost $3.50 a gallon...
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post #4 of 13 (permalink) Old 04-22-2019, 07:43 AM Thread Starter
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Thanks for the feedback. I went ahead and ran a tank of 91 with some Seafoam cleaner and will go back to 87 after it is gone. The previous owner changed out the exhaust and made some mods to the fuel injection so now that I have gone back to stock exhaust I may need to get it into the shop for some minor adjustments. It runs a little rough at idle but is not trying to die on me or anything like that. I have a friend that runs 87 in his 2012 all the time and has no issues. Thanks
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post #5 of 13 (permalink) Old 04-22-2019, 09:55 AM
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I always put super in my boats, mowers and toys ...... they don't get run every day and when they do, they get run hard, so deserve the best.
Plus, these toys are made high compression to run on the edge .... a coup0le dollars extra wont hurt.
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post #6 of 13 (permalink) Old 04-22-2019, 01:03 PM
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Quote:
Originally Posted by ACAMS View Post
I always put super in my boats, mowers and toys ...... they don't get run every day and when they do, they get run hard, so deserve the best.
Plus, these toys are made high compression to run on the edge .... a coup0le dollars extra wont hurt.

The Rhino 700 sports 9.2 compression, easily runs on the lower octane stuff. However it has been my lifelong experience that if our head tells us that the higher octane stuff is more better - that's what we go with (unless the wife says otherwise...).
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post #7 of 13 (permalink) Old 04-22-2019, 07:34 PM
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Quote:
Originally Posted by ACAMS View Post
I always put super in my boats, mowers and toys ...... they don't get run every day and when they do, they get run hard, so deserve the best.
Plus, these toys are made high compression to run on the edge .... a coup0le dollars extra wont hurt.
Amen. it's hard to sometimes quantify the benefits, but easy to quantify the dollars spent. I only run 91 in all my toys.
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post #8 of 13 (permalink) Old 04-23-2019, 04:54 AM
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Why would you put higher octane in something that does not require it? Higher the octane slower the burn equals less performance and more money spent.


Then the quality of gas is the same from one to the next in octane ratings

The whole purpose of high octane is to slow the burn down that a higher compression engine speeds up to have the peak power point at the same degree of rotation of the piston.
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post #9 of 13 (permalink) Old 04-23-2019, 06:09 AM
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Sport machines are usually high compression and made to run on the edge and requires high octane.

If the 700 is only 9.2 CR, then it is on the lower side of the borderline needing super.
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post #10 of 13 (permalink) Old 04-23-2019, 02:56 PM
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hi guys I have the 2012 hunter add. my owners manual said pg. 5-4 pump octane 86 or higher or research octane 91 or higher I buy mine at the pump so its 86 or higher for me thanks tex.
07,700 grizzly.
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post #11 of 13 (permalink) Old 05-03-2019, 03:36 PM
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I am not sure if it is worth noting, but since the 87 octane sells faster, it may also be fresher when you buy it. I don't think it would be an issue in your 700, but old gas in my 660 is a concern.
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post #12 of 13 (permalink) Old 05-04-2019, 08:39 AM
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I sometimes run 91 but usually buy the middle octane just for peace of mind (if that can ever happen, lol).
FWIW, I always treat my fuel with marine stabil , every time, in all my toys including my toy hauler.
Worked well for my boat so it cant hurt.
my .10 cents worth (inflation)

- '08 700 Rhino Midnight Edition
- HID headlights
- UNI air filter
- HCR spindles
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post #13 of 13 (permalink) Old 05-04-2019, 09:16 AM
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Pump gas has its issues ,..depending on what part of the country you live. Most gas doesn’t retain its octane level for more than three weeks unless treated if exposed. Carb 660 91 always to be safe... EFI stockers 87 should work..but if it sits , aftermarket HP parts, heat ,large tires and high loads 91
Might be a wiser choice

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