Results 1 to 5 of 5

Thread: Feul question

  1. #1
    brad148405's Avatar
    Join Date
    Jul 2008
    Location
    Kansas city, Missouri
    Posts
    167

    Feul question

    Is it better to run low ocatane (reg 87octante) feul or premium fuel? I noticed I I ran premium this time, (91 octane) and notice it ran alot faster/better. any comments?


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,584
    +1
    1,272
    If you are seeing a performance difference with higher octane, then the motor is not happy with the quality of the 87 octane gasoline you have been using.

    Polaris recommends 89 Octane gasoline, especially if it has Ethanol or other oxygenates. 87 Octane is allowed only if it is straight gasoline, no Ethanol or other additives.

    In order to avoid Ethanol in my area, I have been buying 91 Octane gasoline, as much to avoid the Ethanol as for the extra two octane points.

  3. #3
    brad148405's Avatar
    Join Date
    Jul 2008
    Location
    Kansas city, Missouri
    Posts
    167
    cool thanks. Much appreciated K447 as always one more question regarding this subject, whats the reason to avoid using ethanol? does it clog up the carbs?

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    Location
    near Toronto, Canada
    Posts
    36,584
    +1
    1,272
    Quote Originally Posted by K447 View Post
    ...In order to avoid Ethanol in my area...
    Quote Originally Posted by brad148405 View Post
    ...what's the reason to avoid using ethanol?...
    Click the link to read more about Ethanol in marine engines.

  5. #5

    Join Date
    Aug 2006
    Location
    Iowa
    Posts
    1,028
    +1
    2
    your ski will perform the best on the lowest octane you can run..........that does not cause preignition or detonation. Generally a premium around the 90 range is your best bet.

    Ethanol is basically just $hit. It's corrosive (not good for the aluminum, and also eats at rubber--crank seals, o-rings etc..)

    Ethanol also will seperate from gasoline when moisture is present, which with watercraft, moisture is almost always present. When it seperates, you will form a layer of gasoline, a layer or ethanol, and a layer of water. Ethanol burns around 30-50% leaner, so if you suck up straight ethanol from seperation, you're running your engine too hot.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. RXT handling question
    By MPower in forum 4-Tec Performance
    Replies: 5
    Last Post: 08-11-2009, 10:04 AM
  2. 158 Thermostat question...
    By rx4pain in forum 4-Tec Performance
    Replies: 34
    Last Post: 11-21-2008, 10:36 PM
  3. Oil Level question , this thing mixes me up :(
    By rxp_boy in forum 4-Tec Performance
    Replies: 4
    Last Post: 05-23-2005, 10:03 AM
  4. Question for the Hulk
    By Therock in forum 4-Tec Performance
    Replies: 3
    Last Post: 05-20-2005, 07:13 AM
  5. RXP VTS Question
    By 1FastTrespiper in forum 4-Tec Performance
    Replies: 4
    Last Post: 05-08-2005, 10:53 PM

Posting Permissions

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