What oil should you use for diesel truck?

Updated: 4/28/2022
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10y ago

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15w30 or 15w40 are common for "all around" usage. Make sure it's oil specifically for diesel engines.... API CJ4 is mandatory if you have a more recent model with Selective Caralytic Reduction, and is compatible with earlier Diesel engines.

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Q: What oil should you use for diesel truck?
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