Diesel & Heavy Duty Products

Duralec® Super Diesel Motor Oil
DURALEC® ULTRA DIESEL MOTOR OIL

Footer

Address

1060 N Capitol Ave
Suite 6-401
Indianapolis, IN 46204-1044

Phone

281-354-8600
888-382-6300

Fax

281-354-7600

About
FAQ
SDS
Cal-Connect
Contact
Careers

Human Rights
Privacy Policy
Royal Purple Consumer Chemical Additive Limited Warranty
Royal Purple Consumer Lubricant Limited Warranty
Royal Purple Industrial Lubricant Limited Warranty

© 2025 Calumet, Inc., All Rights Reserved.
All trademarks are owned by Calumet Branded Products, LLC (“Calumet”)—a wholly-owned subsidiary of Calumet, Inc.—or an affiliate, unless otherwise specified. These trademarks may be registered in the U.S. and elsewhere.
All third party trademarks referenced by Royal Purple® remain the property of their respective owners.

Solutions
Royal Purple Products
Product Selector
Retail & Service Finder
Brochures
- Consumer Brochure (PDF)
- Industrial Brochure (PDF)
About Us

Search for:

Diesel & Heavy Duty Products

Duralec® Super Diesel Motor Oil

DURALEC® ULTRA DIESEL MOTOR OIL

Address

Phone

Fax