Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

  • Announcements

    • Rick

      Members Only Fluid Forum View   08/08/2017

      Fluid forum view allows members only to get right to the meat of this community; the topics. You can toggle between your preferred forum view just below to the left on the main forum entrance. You will see three icons. Try them out and see what you prefer.   Fluid view allows you, if you are a signed up member, to see the newest topic posts in either all forums (select none or all) or in just your favorite forums (select the ones you want to see when you come to Fishing Minnesota). It keeps and in real time with respect to Topic posts and lets YOU SELECT YOUR FAVORITE FORUMS. It can make things fun and easy. This is especially true for less experienced visitors raised on social media. If you, as a members want more specific topics, you can even select a single forum to view. Let us take a look at fluid view in action. We will then break it down and explain how it works in more detail.   The video shows the topic list and the forum filter box. As you can see, it is easy to change the topic list by changing the selected forums. This view replaces the traditional list of categories and forums.   Of course, members only can change the view to better suit your way of browsing.   You will notice a “grid” option. We have moved the grid forum theme setting into the main forum settings. This makes it an option for members only to choose. This screenshot also shows the removal of the forum breadcrumb in fluid view mode. Fluid view remembers your last forum selection so you don’t lose your place when you go back to the listing. The benefit of this feature is easy to see. It removes a potential barrier of entry for members only. It puts the spotlight on topics themselves, and not the hierarchical forum structure. You as a member will enjoy viewing many forums at once and switching between them without leaving the page. We hope that fluid view, the new functionality is an asset that you enjoy .
Sign in to follow this  
MNBIGBEAR

Is there a big difference with gas??

Recommended Posts

MNBIGBEAR

I know I have read some of the previous posts but does anyone know if there really is a big difference between say 87 octane and the 91 octane that you can buy? I have a 4 stroke yamaha and I have heard both sides of the coin. Some say the cheaper stuff actually burns better and then some say that the 91 burns cleaner. Anyone know for sure?

Share this post


Link to post
Share on other sites
mechanictim

The higher the octane of the fuel the harder it is to ignite, when operating a high compresion engine the high octane prevents preignition(ignition of the fuel air mix caused by the combined heat of the combustion chamber and the heat of compression) which causes knock. If your engine has a compresion ratio of 9.5 to 1 or less you will get better performance with the 87 octane. For a compresion ratio of 10.5 to 1 or greater you need the 92 octane, for engines in between you can use the 89 to 91 octanes.

The lower octane fuel will run cleaner in a low compresion engine because it will burn more completely and because it burns more completely it also will get better mileage.

Share this post


Link to post
Share on other sites
New Yankee

Bigbear - gas choices can be the same Ford v Chev arguements. The difference in octane ratings is the measure of the resistance of the particular hydrocarbon blend to pre-ignition knock, or pinging. The additives that a particular refiner or brand uses can differ, but the formulation of higher octane fuel does not inherently create a better or cleaner fuel, just the temperature at which unaided or spontaneous ignition occurs - pinging (remember temps increase under compression - the old muscle cars running 12 to 1 needed high test to avoid pre-ignition).

I think we often assume if it costs more it has to be better, and often that assumption is correct. What works for you may not work for me. As someone else posted, and I wholeheartedly agree with, is my truck/boat/etc runs better when it's clean smile.gif Not pulling your leg, but cause and effect and the perception of same often overules physics, at least in our own worlds.

I'll not try to dissaude you from using high octane if you feel it works for you, just as I wouldn't try to tell you your Makers Mark is no better than well bourbon since they may be the same proof. I think a compelling arguement can be made that using what your owners manual suggests is likely the best solution.

There really is a wealth of info on the web if you simply search 'gasoline octane'. You will find opinions on either side of the spectrum but the majority opinion will suggest the same. I'm a 87 or 88 guy, since I don't own anything that needs the high test - DARN! Theoretically, high test in a lower compression engine could cause the carbon build up (due to incomplete combustion at lower temps) that one seeks to avoid and create a self fulfilling need after carbon builds to a point of increased compression. From a practical standpoint, I suspect it would take quite a few years of use to create this, and for outboards would often be negated/eliminated by the use of ethanol, seafoam or the annual de-carb that many do routinely.

My two... and worth what you paid for it!

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  



  • Posts

    • KidMoe
      I was worried about the wire size too. Thanks ProV. I guess I can’t avoid it. 
    • fishingstar
      you don't have any wires on your 7 pin plug that is heavy enough.  
    • PRO-V
      I would run wire straight to the battery with an in line fuse at the battery and use a separate 2 prong connector at the trailer.
    • kelly-p
      Unfortunately they have not found them yet. Freeze up  with the thin ice has really hampered the search. Too much ice for boats and not enough to travel on. As the ice thickens the searchers are working their way deeper. Such a sad situation.
    • KidMoe
      I’m hoping I can get some advice from you fine folks. I’m looking to install a small electric winch on my snowmobile trailer to load my skid house. I’m wondering if I can power it off the 7 pin connector?  From what I can find, my truck is fused at 10 amp and most of the winches I’m finding pull somewhere around 50 to 60 amps at 1500 lbs or so. I’m wondering what I could do to still run it off the 7 pin. Do I need to add a battery? Maybe a capacitor? i appreciate any thoughts you might have!
    • Cliff Wagenbach
      I spotted them also this evening out from McKinley. A few more days yet before I will give it a try! Cliff
    • Spearing Machine
      First fisherman seen trying their luck today out from McKinley park access and Stuntz Bay access. 
    • Wanderer
      Definitely not surprised with this change. One might as well license the wheel house anyway.  Keeping it legally “occupied” is a pain just to avoid buying the license.
    • Rick
      A public meeting to discuss a draft transition plan for Hill Annex Mine State Park will take place Thursday, Nov. 30, from 4 to 6 p.m. at the Calumet City Hall, 932 Gary St., Calumet. Legislation in 2017 guided five local partners (DNR, Iron Range Resources and Rehabilitation Board, Itasca County, City of Calumet and the Western Mesabi Mine Planning Board) to work on an alternate operating model for local management and operation of the Hill Annex Mine. The work group has concluded that operation of the site as a park under any jurisdiction is extremely unlikely and is proposing a feasibility study to explore other local economic development opportunities that preserve the history of Hill Annex Mine, promote existing amenities along the Mesabi Trail, and better connect the cities of Calumet and Marble. At the public meeting, the work group will hold a facilitated discussion to review feedback on the draft project report. The report will be submitted to the 2018 Legislature. Interested members of the public are welcome to attend and participate in the discussion. Discuss below - to view set the hook here.
    • JerkinLips
      I am a lazy angler, so winter fishing suits me fine.  I typically fish with pike suckers or chubs on a plain #6 hook 6" off the bottom, and do just fine on ice.  As they said, the best bite times are sunrise-10:30am and 3:00pm-sunset; although I do occasionally catch some in the middle of the day.  I have caught very few walleyes after dark.