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LOWER VISCO CITY

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HOME OF FUEL EFFICIENT GUARDOL® FE 10W-30

Lower viscosity Guardol FE 10W-30 is leading the industry with its new FA-4 formulation. It is proven to deliver up to 2% fuel savings while providing superior wear protection.

Wear protection that far exceeds Mobil Delvac

Guardol FE significantly outperforms Mobil Delvac Extreme FE 10W-30 in the DD13 Scuffing Test. And after 92 million miles of on-road testing and multiple engine tear downs, pistons and cylinder liners showed little to no signs of wear.

DD13 Scuffing Test Results

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At 200 hours, Guardol FE 10W-30 showed no scuffing.
The DD13 Scuffing Test (ASTM 8074) was run at an independent lab using blind samples. This is a fired-engine test with all emissions controls, which runs for 200 hours or until scuffing is detected, whichever comes first.

Fuel economy to drive profits

With Guardol FE, Class 7–8 fleets can expect up to 1.5% fuel savings, and Class 6 fleets can expect even more, up to 2%.
See what you can save below.

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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.


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* Today’s average price of diesel (Gal.)

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TAKE THE LOWER VISCO CITY CHALLENGE

The only way to really find out how an oil benefits your fleet is to test it in your own trucks at their pace. Fleets who have already taken advantage of this risk-free trial have noticed not only increased fuel economy but also much cleaner engines—even after a single oil drain of Guardol FE 10W-30.

The trial includes:

  • Guardol FE 10W-30 for 5 to 10 trucks in your fleet

  • Two oil changes at your standard drain intervals

  • Technical supervision of oil drains with your crew

  • Oil analysis with an independent lab or at your current lab

Industry-Leading Extended FA-4 Warranty

Phillips 66 is so confident in the protection and performance of Guardol FE 10W-30 that we’ll cover many model years OEMs don’t yet include. 

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READY TO LOOK DEEPER INTO GUARDOL FE 10W-30?

Download our product data sheet below.