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  1. #51
    Join Date
    Jul 2008
    Location
    Des Moines, IA
    Posts
    2,597

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    The problem we have is that 89 here is always an ethanol blend, so it's either 87 or 91.

  2. #52
    Join Date
    Nov 2010
    Location
    Katy, TX
    Posts
    4,169

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    I've never used anything other than 87. Didn't even know 89 was recommended. Here everything has ethanol in it.
    David

    2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Harpoon, Exile SM600.1 , Exile Xi800.4.

  3. #53
    Join Date
    Jul 2009
    Location
    Fort Worth, TX
    Posts
    1,027

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    I've was checking out the new indmar site and it looks like all of their new 330hp and 345hp are designed for regular unleaded.
    -2012 Supra 21v
    Wetsounds Rev10's, Wetsounds SYN 4, Wetsounds XS-12, Alpine MRP-M500,
    JL Audio JX360/4, Polk MM651 Interiors
    -2008 Mobius LSV

  4. #54
    Join Date
    Feb 2009
    Location
    Wausau, WI
    Posts
    436

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    Quote Originally Posted by bzubke1 View Post
    I've was checking out the new indmar site and it looks like all of their new 330hp and 345hp are designed for regular unleaded.
    I also checked out the web site and noticed in the pictures of the engines they have changed the exhaust manifolds. Yes they now have cats standard, but the tubing from the heads to the cats is no longer water jacketed. Along with some other evolutionary changes.

    On mine, Indmar calls for 89, I usually run 87 w/o any problems. I may run 89 or higher towards the end of the season to get the enthanol level down in the tank. The higher octane stuff is usually ethanol free depending on the station.

    Currently regular 87 is $3.50 gal. I hope it stays under $4 for the summer.
    Matt

    2003 Outback, Assault EFI, (6) Polk Audio DB651s, JL Audio M6600 amp, JL Audio M1700 amp, JL Audio 10w6v2 subwoofer

  5. #55
    Join Date
    Aug 2010
    Location
    The Woodlands, Texas
    Posts
    59

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    I hope it's under 3.50 as well. If not- I'm not going to be so excited filling up all of the ballast every outing.

  6. #56
    Join Date
    Nov 2010
    Location
    Katy, TX
    Posts
    4,169

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    I find it odd that the higher octane fuels have less or no ethanol content in some of yalls states. Ethanol has a higher octane rating than gasoline which is why some E85 vehicles generate more horsepower with E85 than they do with regular E10. The higher octane rating of the E85 allows them to advance timing and squeeze a few extra hp out. I would think that 91 or 93 octane gasoline would contain just as much ethanol as 87.
    David

    2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Harpoon, Exile SM600.1 , Exile Xi800.4.

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