05 V6 Unleaded To Super Unleaded?

Discussion in '2005 - 2014 Specific V6 Tech' started by Queenlexii, May 24, 2013.


  1. Queenlexii

    Queenlexii Member

    Joined:
    May 4, 2013
    Messages:
    8
    Likes Received:
    1
    Trophy Points:
    13
    my hubby wants to put super unleaded in our stang, he said a friend of his said he got more miles out of the 91 octane so he wanted to try it with our car. However, i dont see anything beneficial in changing the gas in the car, and im wondering if it could have negative effects in the long run. we dont have any engine/performance mods (yet) everything is stock.
    #1
  2. Ranzo

    Ranzo New Member

    Joined:
    Jun 18, 2010
    Messages:
    18
    Likes Received:
    1
    Trophy Points:
    4
    Nothing negative and nothing beneficial as far as I know without at the very least a tune for 91.
    #2
  3. echo7

    echo7 Member

    Joined:
    Mar 31, 2005
    Messages:
    547
    Likes Received:
    2
    Trophy Points:
    19
    Location:
    FL
    I would recommend a tune to go along with it. You will get a slight increase in mileage, but it won't make up for the extra cost. I only saw about a .5 - 1 mpg change at most.\

    If you did somehow get 1 mpg better for a tank of gas, maybe 12 gallons worth, that's 12 miles. You paid an extra 12 x 40 cents (maybe more than 40) per gallon for it. That comes to $4.80 extra spent on the whole tank. $4.80 is worth probably 25-30 miles in regular gas.

    .
    #3
  4. Roanstang

    Roanstang Active Member

    Joined:
    Feb 22, 2013
    Messages:
    117
    Showcase:
    8
    Albums:
    1
    Likes Received:
    11
    Trophy Points:
    29
    Location:
    Coastal Texas
    Your 4.0 motor won't see any, if you had the 3.7 the difference is 5-10 hp using 93 octane. It may help keep the internals
    cleaner.
    #4
  5. Queenlexii

    Queenlexii Member

    Joined:
    May 4, 2013
    Messages:
    8
    Likes Received:
    1
    Trophy Points:
    13
    Thanks guys. That's the point I was trying to make to him.
    #5

Share This Page