Since the topic has come up a few times I am posting the PDS in the PCMO, Diesel, and Euro sections. This is a safe path to clean varnish and or sludge left behind by other oils. There are no solvents in this oil. It has enough ester to clean but still be safe with elastomers. Simply add a quart to the current oil and can be used for 1-2,000 miles preferably but can be run longer if needed. Changing a filter at 2,000 miles is recommended should you wish to clean further.
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