Phillips 66 Lubricants Launches Vehicular Natural Gas Engine Oils
HOUSTON – As part of its continued investment in and support of customers using natural gas powered vehicles, Phillips 66 Lubricants has launched two vehicular natural gas engine oils, tri-branded (Phillips 66, Conoco & 76 Lubricants) Guardol NG and Kendall Super-D NG.
HOUSTON – As part of its continued investment in and support of customers using natural gas powered vehicles, Phillips 66 Lubricants, a finished lubricants suppliers, has launched two vehicular natural gas engine oils, tri-branded (Phillips 66, Conoco & 76 Lubricants) Guardol NG and Kendall Super-D NG. Both are for use in compressed natural gas (CNG) or liquefied natural gas (LNG) powered heavy duty trucks as well as other natural gas powered heavy duty mobile equipment, and are available now.
Guardol NG and Kendall Super-D NG replace Phillips 66 Lubricants’ discontinued 76 Triton VGEO Plus, with the formulation remaining the same to meet the enhanced wear protection requirements of diesel-conversion natural gas engines. With these engine oils now a part of the successful Guardol and Kendall Super-D product lines, customers who have converted their engines to natural gas will see the recognized premium performance associated with these motor oils in diesel applications.
“With more of our customers seeking alternatives to traditional fuel due to its cost, availability and impact on the environment, we’re committed to providing them with the superior products they need for a seamless transition,” said Bernie Wallendorf, Director, Commercial Products, Phillips 66 Lubricants. “By expanding the Guardol and Kendall product line—which our customers know and trust—to include natural gas engine oils, Phillips 66 Lubricants has shown that we greatly value our customers and their business.”
Lubricants for natural gas-fired engines must protect against a larger range of conditions than diesel engine lubricants. Tri-branded Guardol NG and Kendall Super-D NG are both formulated to meet these special requirements for converted diesel engines, and offer the following benefits:
• Temperature and oxidation control
• Balanced ash content to prevent valve stem deposits and reduce valve seat recession
• Shear stability
• Exhaust after-treatment protection
The newly-branded oils are approved for the Cummins CES20074 and Detroit Diesel 93K216 specifications. In addition, they provide excellent protection against scuffing, wear, rust and Phillips 66
corrosion. They also have outstanding foam, aeration and nitration resistance, and their high dispersancy protects against sludge and varnish formation.
Guardol NG and Kendall Super-D NG are available now in bulk and drums, and will soon be offered in gallon jugs.
More Operations

Work Truck Seeks Fleet and Industry Insights on 2026 Trends and 2027 Forecasts
Work Truck is seeking insights from fleet leaders and industry partners on the trends that shaped 2026 and what commercial fleets should prepare for in 2027. Participate today!
Read More →
30 Years in Fleet and Still Learning: Lessons Beyond Trucks
After more than three decades in fleet, Bob Adamsky has learned that knowing trucks is only part of the job. The bigger lessons come down to communication, understanding, and never assuming you know it all.
Read More →What Every New Fleet Manager Should Know
Carolyn Edwards shares lessons on finding mentors, showing fleet’s value, and leading teams in this episode of Legends of Fleet.
Read More →From Our Partners
Basic Tracking vs Next Generation Fleet Technology
Sponsored by AT&T Business

5 Facts Every Fleet Manager Should Know About Embedded Telematics
Sponsored by Stellantis/Mobilisights

How AI Video Telematics Boosts Driver Safety and Helps to Avoid Unnecessary Costs
Sponsored by Verizon Connect

Charting the 8 Bottom-Line Benefits of Workforce Optimization
Sponsored by Verizon Connect


Les Schwab Tires Launches Foundation With $100,000 for Community Recovery
Les Schwab Tires launches a foundation with $100,000 to support recovery for Silver Rail Elementary and the Bend community following a school shooting.
Read More →
Bring Some Fleet to Your Halloween with Our Pumpkin Carving Templates
Download Work Truck’s truck-themed pumpkin patterns, explore more automotive designs, and give your shop or front porch a seasonal upgrade.
Read More →
How Cardless Fuel Payments Benefit Commercial Fleets
Is it time for fleets to move beyond plastic fuel cards? David Abraham of WEX explains how cardless fuel payments can help reduce fraud, simplify driver transactions, and improve efficiency by allowing drivers to pay for fuel using their smartphones.
Read More →
Good Fleet Leadership Starts With the People You Already Have
From developing future leaders to listening to employees, discover how better leadership can help work truck fleets retain talent and build stronger teams.
Read More →
ATRI Names Next President and CEO
Page Siplon, a longtime transportation and logistics industry executive, has been chosen as the next president and CEO of the American Transportation Research Institute (ATRI).
Read More →
Coltrain Onsite Fleet Care Sponsors 2026 Cure Bowl to Support Cancer Research
The mobile fleet maintenance provider is supporting the annual college football bowl game, which has helped raise $6.83 million for cancer research since 2015.
Read More →
Racing Lessons, Electric Fleet Growth, and Ghostbusters Lead This Week's Work Truck News
Racing lessons for fleets, Republic Services' electric truck expansion, 40 years of fleet wisdom, truck trivia, autonomous yard trucks, and more headline this week's Truck Chat Cheat Sheet.
Read More →
