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-   -   Would it be better to use synthetic oil in my 2004 F250 6.0 diesel. (https://www.askmehelpdesk.com/showthread.php?t=469965)

  • May 10, 2010, 12:06 PM
    Gilbertd
    Would it be better to use synthetic oil in my 2004 F250 6.0 diesel.
    Would it be better to use synthetic oil in my 2004 F250 6.0 diesel? If so should I use 5W40 or 15W40?
    Thank you
  • May 10, 2010, 12:13 PM
    TxGreaseMonkey

    You absolutely want to use full-synthetic heavy duty diesel engine oil (HDDO) in your truck, especially if it has a turbo. I would lean towards SAE 5W-40 for slightly better mileage.

    These links may help:

    https://www.askmehelpdesk.com/cars-t...ml#post1415281

    https://www.askmehelpdesk.com/cars-t...ml#post2162069

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