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By law, auto manufacturers cannot endorse a particular brand of motor oil. Many have gone on record, however, to state that using
re-refined oil does not affect warranty coverage. As long as an oil is API certified, it doesn't matter if the oil is
re-refined, mineral-oil-based, synthetic, partly synthetic, or hydrocracked. Here are a few positions:
Ford
"Ford recommends using engine oil meeting Ford Specification ESE-M2C153-E and licensed as certified for gasoline engines by the American Petroleum Institute (API).
Re-refined oils are capable of meeting these requirements. . . it is the responsibility of the oil marketers to ensure that their products meet the requirements consistently and continuously. It is Ford's view that a
re-refined oil produced with stringent manufacturing controls, batch-to-batch testing of low-temperature viscosity performance and other significant characteristics, would comply with Ford's recommendations." |
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General Motors
"G.M recommends for use in its vehicles oils that meet performance requirements specified in the latest Performance Standard and Approval Committee Minimum Performance Standard, and
that are certified by the American Petroleum Institute... oils meeting those requirements can be made with either virgin or
re-refined base oils... General Motors encourages the use of properly qualified
re-refined products which consistently satisfy recommended performance requirements." |
Chrysler
"Chrysler cannot condemn or endorse re-refined oils...recommends engine oils meeting the requirements of API Service category SG of
SG/SC and of SAE 5W-30 or 10W-30 for the gasoline engines it sells." |
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Detroit Diesel
"Detroit Diesel.favors the recycling of waste oil and permits the use of
re-refined oils in all engine product lines, provided the re-refined oil meets the SAE Viscosity, API, and
Military specifications." |
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