Mercedes-Benz Position On Re-Refined Engine Oils

King County Commission
For Marketing Recyclable Materials
400 Yasier Building, Room 200
Seattle, WA 98104
USA

Rerefined Engine Oil

Dear Sir or Madam,

Many thanks for your letter of 7th November to our department VSE/PB.

We would like to comment on your questions as follows:

For several years now we have used products which have a rerefined content as "factory fill" products for our passenger car engines. At certain times differing amounts of rerefined content were in use for various reasons.

If these rerefined oils are manufactured correctly, there is then no reason not to use them. We approved the use of rerefined engine oils for use in our engines decades ago. The requirement is, above all, that the rerefining process is perfect and the oils are alloyed correctly just like virgin base oils.

We check the performance of engine oils. It is left to the customer if he then uses a mineral oilbased, rerefined, synthetic, partly synthetic or hydro-cracked oil.

We hope that these details are of use to you.

Yours sincerely,
Mercedes-Benz Aktiengesellschaft
Mercedes-Benz

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