Heavy Duty

GUARDOL ECO® DIESEL ENGINE OIL

Phillips 66® Guardol Eco Diesel Engine Oil, formerly known as Firebird Heavy Duty EC,…

GUARDOL ECT® SYNTHETIC BLEND DIESEL ENGINE OIL

Phillips 66® Guardol ECT (Emission Compatible Technology) Synthetic Blend Diesel Engine Oil is a premium…

GUARDOL EURO® FULL SYNTHETIC DIESEL ENGINE OIL 

Phillips 66® Guardol Euro Full Synthetic Diesel Engine Oil, formerly known as Triton Euro,…

GUARDOL FE® FULL SYNTHETIC DIESEL ENGINE OIL 

Phillips 66® Guardol FE (Fuel Economy) Full Synthetic Diesel Engine Oil, formerly known as…

GUARDOL FE® SYNTHETIC BLEND DIESEL ENGINE OIL

Phillips 66® Guardol FE (Fuel Economy) Synthetic Blend Diesel Engine Oil is a premium…

GUARDOL FLEET EC® DIESEL ENGINE OIL

Phillips 66® Guardol Fleet EC (Emission Compatible) Diesel Engine Oil, formerly known as Fleet…

GUARDOL® NG-D

Phillips 66® Guardol NG-D is a high-quality synthetic blend, dispersant-detergent engine oil specially designed…

GUARDOL TT™ DIESEL ENGINE OIL

Guardol TT™ Diesel Engine Oil is a high-quality API CK-4 engine oil developed for…

GUARDOL XT® FULL SYNTHETIC DIESEL ENGINE OIL

Phillips 66® Guardol XT Full Synthetic Diesel Engine Oil is a premium quality, full-synthetic…

HEAVY DUTY DIESEL ENGINE OIL

Phillips 66® Heavy Duty Diesel Engine Oil is a high-quality universal fleet engine oil…

POWER-D® ENGINE OIL

Phillips 66® Power-D Engine Oil is a premium quality universal fleet engine oil designed…

POWER-D® ENGINE OIL 15W-50

Phillips 66® Power-D Engine Oil is a premium quality synthetic blend universal fleet engine…

RAMAR® DIESEL XDO

Phillips 66® Ramar Diesel XDO is a high-quality, zinc-free, heavy-duty diesel engine oil designed…

T5X® HEAVY DUTY DIESEL ENGINE OIL

Phillips 66® T5X Heavy Duty Diesel Engine Oil is a high-quality diesel engine oil designed…

T5X® PLUS HEAVY DUTY DIESEL ENGINE OIL

Phillips 66® T5X PLUS Heavy Duty Diesel Engine Oil is a high-quality diesel engine…