Gas: Premium, or not? - Page 2
Page 2 of 2 FirstFirst 1 2
Results 11 to 18 of 18
Like Tree1Likes

Thread: Gas: Premium, or not?

  1. #11
    Super Moderator longdistancerider's Avatar
    Join Date
    Oct 2011
    Location
    Vancouver Washington (text 408-239-9580)
    Posts
    21,710
    The recommended octane for your bike is 86 pump number. This applies to all of the 1978-86 CB/CM 400/450's.
    The "premium" fuel underground storage tank at a gas station is @10% the size of the "regular" tank so there is less fuel in there and needs refilling more often. I know of 2 fuel stops in my area that only sell regular and diesel due to they're location, 40+ miles from the nearest town with more than 200 people,
    Jim O'Brien
    1979 CM400T "road bike" modified for travelling
    1978 CB400T1 restored
    1972 CL350 survivor restoration


    https://www.hondatwins.net/forums/22...d-attempt.html and https://www.hondatwins.net/forums/1-...r-attempt.html
    Road Trip https://www.hondatwins.net/forums/11...here-i-go.html or "where's Jim now?"
    Member Map https://www.hondatwins.net/forums/dcMembermap.php

  2. #12
    Junior Member Dana W's Avatar
    Join Date
    Apr 2014
    Location
    Minneapolis Minnesota
    Posts
    26
    I run non oxy premium in all my air cooled machines. Though the price really has skyrocketed.

  3. #13
    Super Moderator Mydlyfkryzis's Avatar
    Join Date
    Jul 2012
    Location
    Northern NJ USA
    Posts
    5,916
    Premium is a waste if your engine has stock compression and timing.


    Sent from planet Earth using mysterious electronic devices and Tapatalk
    Richard

    Mydlyfkryzis = Mid Life Crisis
    My Build:http://www.hondatwins.net/forums/1-p...-ignition.html

    ______________________
    1991 Honda Nighthawk 750 "Big Red"
    1976 CB360t "Sophie"

  4. Remove Advertisements
    HondaTwins.net
    Advertisements
     

  5. #14
    Junior Member Dana W's Avatar
    Join Date
    Apr 2014
    Location
    Minneapolis Minnesota
    Posts
    26
    In my 74 Beetle its a necessity. Sadly its the only way to get non corn gas in my state.

  6. #15
    Senior Member phil71's Avatar
    Join Date
    Aug 2013
    Location
    Brooklyn, new york
    Posts
    1,173
    For what it's worth, here's some thoughts on fuels and our bikes, as tested in a k1 cb750, a 65 cb160 and a 66 CA100 super cub. I have to preface this by saying I run very small amounts of lead substitute in all these bikes, and not super religiously, and I'm comparing it to 87 octane (gasahol) I have tried 104 octane leaded cam 2. The cb 750 liked it, but the thinner fuel wept from the carbs. The super cub leaked profusely, and did not run very well. The cb160 showed no discernible difference.
    I then took 5 gals of 91 octane unleaded sunoco 'real gas' home with me after a track day. EVERY BIKE ran better. Snappier, easier to start, and a noticeable seat-of-the-pants change in performance.

  7. #16
    Senior Member WintrSol's Avatar
    Join Date
    Jul 2011
    Location
    Florissant, MO
    Posts
    2,286
    There's no doubt that gas without ethanol in it runs better, even if you don't need the higher octane; higher-octane with ethanol is, IMO, a waste of time, and may run worse, since it is the ethanol that gives it the octane boost. Keeping it dry is paramount, too; don't let your bike sit around with a half tank, or it will get wet inside.
    As far as lead substitute goes, it won't do anything for your 750, because Honda had long since begun using hardened valves and valve seats; I don't know what years they began, so can't be so positive about the earlier ones.
    Rick

    Mine is a mostly 1970 CB450K3

  8. #17
    Supporting Member ninadm's Avatar
    Join Date
    Apr 2013
    Location
    Mountain View, CA
    Posts
    1,056
    Found this great blog post on the drawbacks of ethanol added gasoline:
    More on Fuel And Fuel Additives - Fear the Corn? | Randakk's Blog
    I especially like the list of suggestions.

  9. #18
    Senior Member LashLarue's Avatar
    Join Date
    Jun 2012
    Location
    Dallas Texas
    Posts
    530
    Look at #5 on the link above on ethanol. It is the lean out effect. Would premium help this lean out effect?

    I want all my bikes to run on the least best gas available. Last thing I want is to be running low on fuel and need to drive 10 miles to the airport for AvGas. There is another thread here on ethanol and it has suggested using Sta-bil and MMO. I plan to put an ounce of MMO in my tank this afternoon. It already has Sta-Bil but not the marine. I StaBil often cause you never know when they will get parked for 3 or 4 months.
    Mike

    CT90 (2)
    SL350 - k1

Page 2 of 2 FirstFirst 1 2

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Search tags for this page

1982 motorcyle premium gas overheat

,

honda sl350 k1 octane

,

hondatwins premium gas

,

premium gas honda cb360

,

what octane for honda cb360

Click on a term to search our site for related topics.