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Engine knock

Discussion in 'General Tundra Discussion' started by Joe24, Mar 25, 2019.

  1. Mar 25, 2019 at 11:28 AM
    #1
    Joe24

    #1
    Joe24 [OP] New Member

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    Jose
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    Hey guys... So i bought my truck a 2019 trd sport with the 5.7L about 3 months ago and was hearing an engine knock. I have always used 91 octane and well decided to try 87 octane which is the lowest octane availabe to see the difference..
    For a surprise the engine knock went away and i got better fuel economy...
    Ain't it supposed to be the other way around?
     
    Joe24, Mar 25, 2019
    #1
  2. Mar 25, 2019 at 11:29 AM
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    Black Wolf

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    Black Wolf Bigfoot Hunter, Sasquatch too, but not Yeti

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    Your TRD Sport should be tuned to run best on 87 from the factory.
     
    Black Wolf, Mar 25, 2019
    #2
    Joe24[QUOTED][OP] and 15whtrd like this.
  3. Mar 25, 2019 at 11:33 AM
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    Black Wolf

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    Black Wolf Bigfoot Hunter, Sasquatch too, but not Yeti

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    How much is gas there in P Rico?
     
    Black Wolf, Mar 25, 2019
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  4. Mar 25, 2019 at 11:38 AM
    #4
    Joe24

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    Joe24 [OP] New Member

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    Right now its $0.74 per liter 87 and $0.85 per liter for 91
     
    Joe24, Mar 25, 2019
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  5. Mar 25, 2019 at 11:41 AM
    #5
    Black Wolf

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    Black Wolf Bigfoot Hunter, Sasquatch too, but not Yeti

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    Converted... $2.80 a gallon for 87 is not bad and $3.22 for 91:thumbsup:.
     
    Black Wolf, Mar 25, 2019
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    15whtrd likes this.
  6. Mar 25, 2019 at 11:56 AM
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    Joe24

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    Joe24 [OP] New Member

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    Yep.. Its not bad but with all of the forums and web articles i've read.. Same outcome 91 octane better for fuel economy, engine function and power..
    But the tunning aspect sounds right, although the 2014 ram i had went through a tank of 87 like it was nothing and ran horrible
     
    Joe24, Mar 25, 2019
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