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

Top 50 Executive Fleets
It is that time of year again! Time for the 2026 list of the Top 50 Executive Fleets, presented by Automotive Fleet and Volvo as part of its annual Fleet 500. Download now to see this year's list of companies!
Read More →
Behind the Scenes: Building the Ringmaster of the Road from Body to Paint Part 2
The body is built, the paint is on, and Team Fletcher’s Soap Box Derby car is nearly ready for testing ahead of race day in Akron.
Read More →
It's All Downhill from Here! Fleet Industry Raises $22,000 for Skilled Trades Scholarships
Work Truck’s Lauren Fletcher and Automotive Fleet’s Chris Brown turned a friendly racing rivalry into $22,000 for automotive technology and skilled trades scholarships.
Read More →
Fleet Confidence, Safety, and Smarter Risk Management Lead This Month
This month’s TruckChat: Top Monthly News Recap explores what it takes to build confidence across a fleet, from stronger leadership and technician support to better safety preparation, smarter use of telematics, and clearer plans for when something goes wrong.
Read More →From Fleet Operator to OEM Leader: Tina Kourakos’ Career Lessons
Tina Kourakos shares the lessons, relationships, and career pivots that shaped more than 30 years in fleet, plus the advice every new fleet manager should hear.
Read More →
WEX Brings Standard Fleet's Connected Vehicle Platform to Fleet Customers
This week’s product launch with Standard Fleet’s connected vehicle platform reflects WEX Venture Capital's strategy of turning startup innovation into customer solutions. Standard Fleet is now available to WEX fleet customers.
Read More →Meet Atlas: Motive's AI Assistant for Fleets
Artificial intelligence is becoming a practical tool for fleet operations. In this video, Emily Parsons introduces Atlas, Motive's AI-powered assistant that combines conversational search with the ability to perform actions across the Motive platform.
Read More →The Top 300 Commercial Fleets
The Top 300 Commercial Fleets: See the List
Read More →
NTEA Releases Updated Federal Excise Tax Guide for the Work Truck Industry
NTEA’s latest revised edition of its Federal Excise Tax Guide for the Work Truck Industry is now available to help fleet leaders navigate complex federal tax requirements.
Read More →
Super Dispatch Powers Centralized Vehicle Transport Operations for Merchants Fleet
Merchants Fleet has replaced fragmented transportation processes with Super Dispatch’s unified, API-powered platform to improve visibility, automation, and carrier performance.
Read More →
