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Kirkland diesel oil

simp5782

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I happened upon enough free Kirkland brand 15w40 to do an oil change. Is it ok to use? Or should I stick with rotella?

Thanks-
I use it in everything I run. Cheap enough to compete with mobil delvac and my costco is never out of it unlike Walmart and Sam's don't have crap.

All diesel oils have the same additive package.
 

XPLRNX2

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I use it in everything I run. Cheap enough to compete with mobil delvac and my costco is never out of it unlike Walmart and Sam's don't have crap.

All diesel oils have the same additive package.
I've wondered the same about quality of the Kirkland oil, thanks for sharing your experience!👍👍😎
 

msgjd

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From what I've read about the Kirkland brand, be it oil, meats, and many household items, it generally is coming from top-of-the-line brand names under contract with Kirkland distributing .. Always read the specs on oil labels no matter what, if it matches Mack, Caterpillar, Mil-Spec etc listed for your truck you should be just fine
 
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BKubu

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My feeling on oil is stick with a good brand name oil. I have no idea who refines Kirkland oil, but I would bet it is a big refiner. I have used NAPA oil, which used to be made by Valvoline. I also use Delvac and Rotella, among other brands. Guys get all crazy about oil brands like pickup truck brands. Get a good one. That's it. With that said, MOST of us don't use our trucks for anything to make a difference.
 
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