The new API CK-4 and FA-4 diesel oil specifications focus on drastically reducing emissions and improving fuel economy, while providing increased engine-protection benefits. Click the image for more information.

The new API CK-4 and FA-4 diesel oil specifications focus on drastically reducing emissions and improving fuel economy, while providing...
Although you might know that synthetic oils outperform conventional oils, you might not understand why. The differences begin at the molecular level.
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