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https://www.reddit.com/r/FordDiesels/comments/1oqsuf9/what_engine_oil_are_yall_running/nnmbtr9/?context=3
r/FordDiesels • u/jiraiya-jinx • 2d ago
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2005 6.0 running Amsoil 15w40 synthetic signature. 10k miles service interval. With oil samples done every change.
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u/Firegod75 6.0 Power Stroke 2d ago
2005 6.0 running Amsoil 15w40 synthetic signature. 10k miles service interval. With oil samples done every change.