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Engine Oil Licensing and Certification System (EOLCS) or Diesel Exhaust Fluid (DEF)

Thank you for your interest in the API Certification Programs. We are pleased to provide you with a complete cost quotation. Please answer the following questions to the best of your ability. At the conclusion of this form, please click the "Request a Quote" button and your information will be sent to API for review.

For immediate assistance, you may contact API at (202) 682-8177 or go to Contact.

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