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Originally Posted by cmlind
Thanks, that is what I thought. I might use a dual rated diesel oil with more antiwear additives. These newer GF-4 SM oils are getting light on the antiwear additives.
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What information do you have about the GF-4 SM oils that indicates they are light on the antiwear additives??
All the new API classified gasoline engine oils have to be backward compatible with the requirements for the previous classifications.....Don't they???
JD