Phillips 66® Guardol FE (Fuel Economy) Diesel Engine Oil with Liquid Titanium protection additive is a premium quality, part-synthetic API FA-4 engine oil developed for fuel economy benefits in 2014 and newer engines.
API FA-4 Products Limited Warranty
We’ve extended our industry-leading limited product warranty to include fleets that use Guardol FE® 10W-30 in:
- All 2010 or newer Detroit Diesel (DTNA) engines
- All 2014 or newer Cummins, PACCAR, International/Navistar and Volvo/Mack engines