Phillips 66® Lubricants has refreshed our modern heavy duty engine oil line so that more of our best products are united under the most trusted and recognized name in our portfolio: Guardol.

The demands of heavy duty engines continue to evolve. So do our heavy duty engine oils.

From the premium protection and fuel efficiency of full synthetic to the reliability of conventional, you can count on Guardol to supply the right oil for every machine in your fleet. All your heavy duty needs are covered by the new lineup. Look below and find the right Guardol for your equipment.

CONTACT US TO LEARN MORE

Trying to decide which Guardol formula is right for your equipment? Ready for a trial? Complete this form and a Phillips 66 representative will contact you.

Guardol Bottle

GUARDOL FE

FULL SYNTHETIC FOR FUEL ECONOMY

API FA-4 5W-30

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Applications

On-highway diesel trucks recommending FA-4 to meet 2017 emissions standards, or mixed fleets with diesel and gasoline fueled vehicles.


Key Benefits

  • Most aggressive fuel economy savings in our lineup with outstanding wear protection
  • High shear stability
  • Specially formulated to protect exhaust aftertreatment systems
Guardol Bottle

GUARDOL EURO

FULL SYNTHETIC

API CK-4 5W-30, 10W-40

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Applications

On- and off- highway diesel equipment operating at low ambient temperatures and those needing to meet certain European specification requirements.


Key Benefits

  • Outstanding soot control for protection against abrasive wear and soot-induced oil thickening
  • Excellent low-temperature pumpability for easier starting and less wear during columnd starts
  • MB 228.51 (5W-30); Scania Low Ash (10W-40)
Guardol Bottle

GUARDOL ECT

SYNTHETIC BLEND

API CK-4 10W-30, 15W-40

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Applications

On-highway diesel trucks, off-highway construction, earth moving and mining equipment in severe duty service.


Key Benefits

  • Ideal for severe duty service or extended oil drain intervals
  • Excellent protection for newer low-emission diesel engines and older diesel engines
  • Exclusive Liquid Titanium protection additive provides enhanced oxidation resistance and protection against engine wear
Guardol Bottle

GUARDOL ECO

ENVIRONMENTALLY RESPONSIBLE

API CK-4 15W-40

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Applications

On-highway diesel trucks off-highway construction, earth moving and mining equipment.


Key Benefits

  • Formulated with 100% re-refined base oil
  • Ideal for federal, state, county and municipal customers
  • Lessens the environmental impact of used oil disposal
  • Protects against rust, bearing corrosion and wear
Guardol Bottle

GUARDOL XT

FULL SYNTHETIC WITH LIQUID TITANIUM

API CK-4 0W-40, 5W-40

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Applications

On-highway diesel trucks, off-highway construction, earth moving and mining equipment, especially those operating at low ambient temperatures or in artic conditions.


Key Benefits

  • Outstanding soot control for protection against abrasive wear and soot-induced oil thickening
  • Exclusive Liquid Titanium additive provides enhanced oxidation and wear control
  • High shear stability and resistance to foaming and aeration
Guardol Bottle

GUARDOL FE

SYNTHETIC BLEND FOR FUEL ECONOMY

API FA-4 10W-30

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Applications

On-highway diesel trucks where additional fuel savings are desired.


Key Benefits

  • All the durability of Guardol ECT®, but with a lower High-Temperature High-Shear (HTHS) value for increased fuel economy
Guardol Bottle

GUARDOL FLEET EC

FOR LOW-EMISSION ENGINES

API CK-4 10W-30, 15W-40

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Applications

Specially formulated for compatibility with exhaust aftertreatment systems using diesel particulate filters (DPFs), diesel oxidation catalysts (DOCs) and/or selective catalytic reduction (SCR).


Key Benefits

  • Conventional CK-4 oil for moderate duty service
  • Protects against particulate filter plugging
Guardol Bottle

GUARDOL NG

NATURAL GAS ENGINE OIL

CES 20092 15W-40

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Applications

Transit buses, school buses, delivery trucks and other diesel-conversion engines equipped with slider-follower valve trains operating on CNG or LNG.


Key Benefits

  • Excellent wear protection for diesel engines converted to natural gas service
  • High dispersancy protects against sludge and varnish formation
  • Protects against valve stem deposits and valve seat recession

WHAT GUARDOL FORMULA IS BEST FOR YOUR EQUIPMENT?

HOW MUCH CAN YOU SAVE BY SWITCHING TO GUARDOL FE 10W-30?

P66_1G_GUARDOL_FE_BLEND_10W-30_ON_WHITE
Low Visco City (Logo)
Fuel
Savings
Calculator

Complete the form below to see how switching from a 15W-40 to Guardol FE 10W-30 can affect your bottom line.


Truck Class
* Trucks in fleet
* Average annual miles per truck
* Average MPG per truck
* Today’s average price of diesel (Gal.)

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  • DD13 ENGINE TEARDOWN

    Phillips 66 experts tear down a 2014 DD13 engine that’s exclusively used Guardol FE 10W30 for all 884,000 miles of its life, increasing fuel economy and industry-leading wear protection.

  • ROBINSON TRUCKING TESTIMONIAL

    Kim Curtis of Robinson Transport, based in Utah, shares his review of Phillips 66 Guardol and explains why his trucking operation won’t use anything else to protect his fleet from long hauls and heavy loads.

  • FA-4 TESTING VIDEO

    Phillips 66 Technical Service Coordinator Shawn Ewing talks about the latest FA4 oils and how they can help fleets like yours cut costs with fuel economy benefits proven through real-world testing.

  • VOLVO ENGINE TEARDOWN

    Philips 66 experts tear down a 2016 Volvo D-13 engine that has exclusively used Guardol FE 10W30 for 762,000 miles on the open road showing a proven increase in fuel economy and industryleading wear protection.

  • DD13 ENGINE SCUFFING TEST

    Phillips 66 expert reviews the performance results of Guardol FE 10W30 on engine parts taken directly from a Detroit Diesel Engine Scuffing Test (DD13). Guardol FE 10W-30 not only increased fuel economy, but also proved to deliver industry-leading wear protection.

  • TOTAL WASTE MANAGEMENT TESTIMONIAL

    For the last two years, Total Waste Management has been testing Philips 66 Guardol FE 10W30 in their new trucks, FA4 oils have proven valuable to their operation after finding unbelievable results.

  • PROMIX CONCRETE TESTIMONIAL

    See how Philips 66 Guardol ECT helps keep the trucks of familyowned business ProMix Concrete running smoothly.

  • PARKE COX TRUCKING TESTIMONIAL

    Parke Cox Trucking trusts only Philips 66 Guardol ECT 10W30 to protect their fleet from the heavy loads as they take on big inclines in the western United States.

TAKE THE TWO-CHANGE CHALLENGE.

PUT YOUR CURRENT HEAVY DUTY
ENGINE OIL TO THE TEST COST
AND RISK FREE.

Up for the challenge?

Questions
about
Guardol?

OR CALL THE TECH HOTLINE 877.445.9198