Best Commercial Engine Oil ???

Discussion in 'Questions From New Drivers' started by Mmuzic12, Jan 17, 2021.

  1. Mmuzic12

    Mmuzic12 Bobtail Member

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    I am looking into finding the best engine oil to use long term in my truck. After doing some research I have learned it is not a good idea to continually change brands because each brands chemistry is somewhat different and it could create more stress on the engine due to the "break in period" which could be up to 40,000 miles each time the brand is changed. Please if I am incorrect here chime in and let me know. I have narrowed it down to three top brands and am looking for some experienced feedback on which is the best or suggested. Thanks ahead for taking time to reply and help!

    The brands are:
    1. Shell Rotella T6 Synthetic 15W-40
    2. Delo 400 Synthetic 15W-40
    3. Mobil Delvac 1300 Synthetic 15W-40
     
    Last edited: Jan 17, 2021
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  3. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    I swear by Delvac.

    That being said lots of guys use Delo. They used Delo in the engines of the cement mixers where I worked as well.

    I can't think of any application that worked an engine harder than those mixers.

    They also used it in the haul trucks for the quarry.
     
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  4. AModelCat

    AModelCat Road Train Member

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    So long as it meets the specs and designations required by the engine manufacturer I wouldn't waste much energy and time worrying about it.
     
  5. SoulScream84

    SoulScream84 Road Train Member

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    Given that the mass marketed oils all pass the same standards, I doubt there's any significant difference aside from cost to pay for their marketing.
     
  6. bzinger

    bzinger Road Train Member

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    If I could put mobil 1 on my pancakes I would lol.
     
  7. AModelCat

    AModelCat Road Train Member

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    What's stopping you? :biggrin_2559:
     
  8. bzinger

    bzinger Road Train Member

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    My wife lol.
     
  9. Cowboyrich

    Cowboyrich Road Train Member

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    All 3 are good lubricants, my 7.3 has Delo in it and runs loaded alot, my Sterling seemed to produce an odd smell running Delo but doesn't with Rotella that's in it.
     
  10. buddyd157

    buddyd157 Road Train Member

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    read the owners manual.

    motor oil recommendations and very often brand name are in that golden bible.
     
  11. God prefers Diesels

    God prefers Diesels Road Train Member

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    You need to check out "Bob is the oil guy" website, if you're going to get serious about this. Tons of info, thousands of posted analysis samples. Those guys have motor oil in their veins.

    Or you could ignore that website, and just run Delvac. It's hard to beat. That being said, there really isn't a "bad" motor oil these days. Even the cheap stuff is good.
     
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