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GulfStar / Diesel Engine Oil

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Explore GulfStar's Diesel Engine Oil range, including lubricants designed for commercial transport, trucks, buses, construction equipment, agricultural machinery and other diesel engine applications.

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01 / Diesel Engine Oil Collection

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Not familiar with the product names? Start with the SAE grades displayed below, then explore each product's technical information and applications.

GulfStar Ultima XT Diesel Engine Oil
Diesel Engine Oil API CJ-4/SM Low-SAPS Technology

GulfStar Ultima XT

High-Performance Diesel Engine Oil

GulfStar Ultima XT is a top-line diesel engine oil developed for high-speed four-stroke diesel engines, including modern engines equipped with emission-control systems such as diesel particulate filters (DPF), exhaust gas recirculation (EGR) and diesel oxidation catalysts (DOC).

AVAILABLE SAE GRADES
10W-40 15W-40
API CJ-4/SM ACEA E7 ACEA E9-08 CI-4 Plus
Applications
  • Commercial road transport vehicles, including trucks and buses.
  • Mixed fleets of European, North American and Japanese diesel engines.
  • Diesel engines operating with modern exhaust emission-control systems.
  • Off-highway construction, earthmoving and mining equipment.
  • Mixed fleets containing diesel and gasoline-powered vehicles.
Performance Standards
  • API CJ-4/SM and CI-4 Plus.
  • ACEA E7-2004 and E9-08.
  • Volvo VDS-4 and MB 228.31.
  • Mack EO-O Premium Plus and Renault RLD-3.
  • MAN 3275-1 and Cummins CES 20081.
  • Caterpillar ECF-3 / ECF-2.
Performance Benefits
  • Supports extended drain intervals under appropriate operating conditions.
  • Helps reduce sludge formation and engine deposits.
  • Low-SAPS technology helps protect sensitive emission-control systems.
  • Provides protection against wear and oxidative thickening.
  • Supports engine cleanliness through detergency and dispersancy.
  • Helps improve cold-temperature starting and pumpability.
Typical Characteristics
  • SAE 15W-40: Viscosity Index — Minimum 140.
  • SAE 10W-40: Viscosity Index — Above 150.
  • TBN — 11 mg KOH/g for both listed grades.
  • SAE 15W-40: Pour Point — -27°C.
  • SAE 10W-40: Pour Point — -34°C.
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GulfStar Ultima XL Plus Diesel Engine Oil
Diesel Engine Oil API CI-4 Plus ACEA E7

GulfStar Ultima XL Plus

Premium Multigrade Diesel Engine Oil

GulfStar Ultima XL Plus is a premium multigrade heavy-duty diesel engine oil designed for European, American and Japanese diesel engines. It provides protection against soot-related viscosity increase, viscosity loss due to shear and engine wear under demanding conditions.

AVAILABLE SAE GRADES
10W-40 15W-40
API CI-4 Plus API CI-4 ACEA E5/E7
Applications
  • Commercial road transport and heavy-duty diesel fleets.
  • Turbocharged, high-performance diesel engines.
  • Engines equipped with exhaust gas recirculation systems.
  • Construction, earthmoving and mining equipment.
  • Agricultural tractors, farm machinery and generator sets.
Performance Standards
  • API CI-4 Plus, CI-4, CH-4 and SL.
  • ACEA E5/E7-04.
  • MB 228.3 and MAN 3275-1.
  • Volvo VDS-3 and Renault Trucks RLD-2.
  • Mack EO-N and Cummins CES 20076 / 20077 / 20078.
  • Caterpillar ECF-2.
Performance Benefits
  • Provides excellent soot-handling and oxidation control.
  • Helps maintain viscosity stability during operation.
  • Provides anti-wear and anticorrosion protection.
  • Helps control engine deposits and sludge formation.
  • Supports longer drain intervals under appropriate conditions.
  • Offers excellent all-weather performance.
Typical Characteristics
  • SAE 10W-40 — Semi Synthetic.
  • SAE 10W-40: Viscosity Index — Minimum 150.
  • SAE 15W-40: Viscosity Index — Above 140.
  • SAE 10W-40: Pour Point — -34°C.
  • SAE 15W-40: Pour Point — -33°C.
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GulfStar Ultima XL Diesel Engine Oil
Diesel Engine Oil API CI-4/SL Heavy-Duty Applications

GulfStar Ultima XL

Heavy-Duty Diesel Engine Oil

GulfStar Ultima XL is a premium-quality heavy-duty diesel engine oil designed for long drain periods and reliable lubrication of commercial diesel engines. Its formulation helps protect against corrosive wear, sludge formation, soot build-up and high-temperature deposits.

AVAILABLE SAE GRADES
10W-40 15W-40 20W-50
API CI-4/SL ACEA E5/E7 Volvo VDS-3
Applications
  • On-highway diesel trucks equipped with EGR systems.
  • Older diesel equipment with conventional engines.
  • Commercial vehicles and mixed fleets.
  • Off-highway construction, earthmoving and mining machinery.
Performance Standards
  • API CI-4/SL.
  • ACEA E5/E7-04.
  • MAN 3275-1 and MB-Approval 228.3.
  • Volvo VDS-3 and Renault Trucks RLD-2.
  • Mack EO-N and Cummins CES 20078.
  • Caterpillar ECF-2.
Performance Benefits
  • Supports high levels of engine cleanliness.
  • Helps protect cylinder liners, piston rings and valve-train components.
  • Provides protection against sludge and varnish formation.
  • Offers excellent soot control.
  • Resists viscosity and thermal breakdown at high temperatures.
  • Helps protect against rust and bearing corrosion.
Typical Characteristics
  • SAE 10W-40: Viscosity Index — Minimum 150.
  • SAE 15W-40: Viscosity Index — Minimum 140.
  • SAE 20W-50: Viscosity Index — Minimum 125.
  • SAE 10W-40: Pour Point — -34°C.
  • SAE 15W-40: Pour Point — -27°C.
  • SAE 20W-50: Pour Point — Below -21°C.
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GulfStar Autolube Engine Oil
Diesel Engine Oil API CH-4/SL Auto Rickshaws & Pickups

GulfStar Autolube

Engine Oil For Auto Rickshaws & Pickups

GulfStar Autolube is a premium-quality engine oil designed for three-wheelers, four-wheelers, auto rickshaws and pickups. It offers soot dispersancy, improved engine cleanliness and protection against wear under demanding conditions.

AVAILABLE SAE GRADES
15W-40 20W-40
API CH-4/SL ACEA E7-04 MB 228.3
Applications
  • Three-wheeler auto rickshaws and pickups.
  • Naturally aspirated and turbocharged diesel engines.
  • Passenger cars and commercial vehicles requiring the listed specifications.
  • On-road and selected off-road engine applications.
Performance Standards
  • API CH-4/SL.
  • ACEA E7-04.
  • MB-Approval 228.3.
  • MTU Type 2 and MAN 3275.
  • Cummins CES 20076 / 20077.
  • Volvo VDS-2 and Caterpillar ECF-1a.
Performance Benefits
  • Helps maintain a protective lubricating oil film.
  • Offers protection against rust and corrosion.
  • Helps control high-temperature deposits.
  • Provides good detergency and dispersancy.
  • Supports thermal and oxidation stability.
  • Offers anti-wear and anti-foam properties.
Typical Characteristics
  • SAE 15W-40: Viscosity Index — Minimum 130.
  • SAE 20W-40: Viscosity Index — Minimum 110.
  • SAE 15W-40: Pour Point — -27°C.
  • SAE 20W-40: Pour Point — Below -21°C.
  • Total Base Number — 10.25 for both grades.
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Product grades and specifications are based on the GulfStar brochure. Always follow the engine manufacturer's requirements and confirm current product suitability and availability with GulfStar.

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