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  1. 06-27-2018 11:33 AM #1
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    RonNP
    RonNP is offline Senior Member
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    Phillips 66 T5X Heavy Duty Diesel Oil

    Has anybody used this oil in your Detroit Diesels? I'm using the NAPA/Valvoline oil but I'm paying $81 per 5 gallon pail. This seems like a better deal but I'm not familiar with the product.

    https://petroleumservicecompany.com/...5-gallon-pail/
    Looking for a 80 plus foot yacht
    Hatteras of Cheoy Lee
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  2. 06-27-2018 02:23 PM #2
    sixty
    sixty is offline Senior Member
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    Re: Phillips 66 T5X Heavy Duty Diesel Oil

    I just changed my oil to that stuff and paid about $11 per gallon here in Mexico. Doing a bunch of other maintence so no chance to run it yet. Meets all of the Detroit soecs so I see no problems with it.
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  3. 07-04-2018 02:03 PM #3
    llldks
    llldks is offline Senior Member
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    Re: Phillips 66 T5X Heavy Duty Diesel Oil

    I’ve used it for last two years without problems..
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  4. 07-05-2018 12:42 AM #4
    oceanjake
    oceanjake is offline Senior Member
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    Re: Phillips 66 T5X Heavy Duty Diesel Oil

    Why not delo100? Cost only?
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