Types of Mobil 1 oil for 3.5 EB - Page 3

Types of Mobil 1 oil for 3.5 EB

This is a discussion on Types of Mobil 1 oil for 3.5 EB within the F150 Ecoboost Performance forums, part of the F150 Ecoboost Garage category; Originally Posted by Bubbabiker I noticed the LE 5w40 doesn't have the API Sx rating for gasoline engines but how does it compare to Delo's ...

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Thread: Types of Mobil 1 oil for 3.5 EB

  1. #21
    Ecoboost Regular mattr66's Avatar

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    Quote Originally Posted by Bubbabiker View Post
    I noticed the LE 5w40 doesn't have the API Sx rating for gasoline engines but how does it compare to Delo's XSP 5w40?
    It has all the good stuff that was removed from modern gasoline oils. It should be considered a "racing" oil.

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  2. #22
    Gold Supporting Member DBCooper's Avatar
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    What is the reasoning for running 5w40 over the recommended 5w30??
    ~Jim~
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  3. #23
    Gold Supporting Member snakebitten's Avatar
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    Uhoh. Lol

    I'm betting it's not a cold climate recommendation. But I'm just guessing.

    It's good and hot down in GearHead land.

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    2018 KingRanch Kingsville Edition- Gen2 3.5 - Runs SO good on Factory tunes. Simply amazing. Good Job Ford

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  5. #24
    Ecoboost Regular mattr66's Avatar

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    Quote Originally Posted by DBCooper View Post
    What is the reasoning for running 5w40 over the recommended 5w30??
    More film strength and better protection at extreme temperatures and loads. With the beating our test vehicles take, I have full faith and confidence in this oil. One oil change on my SHO had over 150 WOT pulls on the dyno and about 20 track passes. I just changed it just because I felt obligated to, but I have a feeling that if sent a sample in for analysis it would have been just fine. I've sheared enough oils down in my past to know when it is done and not able to provide protection anymore. This stuff still felt good when drained. I know many will scoff at this test method, but when oil is sheared down to 10w after hard use you can feel it between your fingers. When I drained, it felt about like a 25-30 weight film strength and was probably only down to that because of fuel dilution and not actual shearing of the oil.

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  6. #25
    Ecoboost Regular mattr66's Avatar

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    Quote Originally Posted by snakebitten View Post
    Uhoh. Lol

    I'm betting it's not a cold climate recommendation. But I'm just guessing.

    It's good and hot down in GearHead land.

    Sent from my SM-N950U using Tapatalk
    The pour point of the LE is better than the factory ford 5w30 oil in the cold...

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  7. #26
    Gold Supporting Member snakebitten's Avatar
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    Quote Originally Posted by mattr66 View Post
    The pour point of the LE is better than the factory ford 5w30 oil in the cold...

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    Well there you go.

    I gotta quit guessing these days.

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  8. #27
    Gold Supporting Member Blown F-150's Avatar
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    Quote Originally Posted by mattr66 View Post
    Motorcraft filter and Lubrication Engineers 8854 5w40 oil....

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    It sure looks like great stuff. Hard to get North of the boarder and best deal I can find is a pail. Equates to $33 a QUART...yikes


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  9. #28
    Ecoboost Veteran Scott91370's Avatar

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    Quote Originally Posted by dseg42 View Post
    Is it also weird that AutoZone will sell Mobil 1 EP for $45.99 and Walmart has it for $25.77?

    But if you watch Auto Zone you can get the 5 qt. bottle and a filter for $29.99 and a $10 gift card.
    Then watch for Mobil's rebate of $17 and you're really down to $3 plus tax.
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    2015 Ingot Silver - 3.5 Ecoboost FX4

  10. #29
    Ecoboost Regular Fstrnyou's Avatar

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    Unrelated to oil weights, but because it was mentioned earlier...

    The Dexos qualification is for LSPI resistance. It has nothing to do with viscosity or lubricity. The test was developed by GM in response to a large number of warranty-covered catastrophic engine failures. It was determined that engine oils burned during combustion would leave a deposit in the chamber that would self ignite in the high temperature environment of gasoline direct injected engines.

  11. #30
    Ecoboost Regular mattr66's Avatar

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    Quote Originally Posted by Fstrnyou View Post
    Unrelated to oil weights, but because it was mentioned earlier...

    The Dexos qualification is for LSPI resistance. It has nothing to do with viscosity or lubricity. The test was developed by GM in response to a large number of warranty-covered catastrophic engine failures. It was determined that engine oils burned during combustion would leave a deposit in the chamber that would self ignite in the high temperature environment of gasoline direct injected engines.
    It has a lot to do with the cheaper detergent packages used in some oils that love to cause LSPI...

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