PETRONAS GEO NG 40

Premium Performance Natural Gas Engine Oil (SAE 40)

Product Description

PETRONAS GEO NG 40 is a premium performance SAE 40 natural gas engine oil specially formulated for the lubrication of a wide range of spark-ignited gas-fuelled engines. It is blended with high-quality mineral base oils and advanced additive technology to enhance engine performance, improve fuel efficiency, and reduce emissions. Its advanced formulation provides outstanding protection against wear, oxidation, nitration, sludge formation, and corrosion while maintaining excellent engine cleanliness and long oil service life. Recommended Applications

PETRONAS GEO NG 40 is recommended for use in:

• Medium- to high-speed four-cycle natural gas engines requiring a low-ash lubricant
• Engines susceptible to valve face and valve seat wear
• Lean-burn and stoichiometric four-cycle gas engines
• Engines equipped with catalytic converters
• Applications using alternative fuels containing low levels of sulfur or chlorine
• Features and Benefits
• Feature Benefit
• Excellent resistance to sludge formation Keeps pistons and engine components clean, extending engine life and reducing overhaul costs
• Superior anti-wear and anti-scuff protection Minimizes wear and scuffing, ensuring longer engine life
• High-performance detergent and dispersant system Reduces ash and carbon deposits on pistons, combustion chambers, and valve train components
• Excellent oxidation and nitration stability Prevents oil thickening, maintains viscosity, and improves oil filter efficiency
• Outstanding rust and corrosion protection Protects engine components from acid-related corrosion and extends equipment life
• High foam stability Prevents foam formation for consistent lubrication and reliable engine performance
• Typical Physical Properties

Property                                           Test Method                    Typical Value

SAE Grade — SAE 40

Specific Gravity @ 15°C                                         ASTM D4052                                        0.876

Kinematic Viscosity @ 40°C                                 ASTM D445                                                121.80 cSt

Kinematic Viscosity @ 100°C                                ASTM D445                                           13.48 cSt

Viscosity Index                                                        ASTM D2270                                         106

Flash Point                                                                 ASTM D92                                                 270°C

Pour Point                                                               ASTM D97                                                –30°C

Total Acid Number (TAN)                               ASTM D664                                                0.42 mg KOH/g

Total Base Number (TBN)                              ASTM D2896                                                5.38 mg KOH/g

Sulphated Ash                                                      ASTM D874                                                 0.48%

Foam Sequence I                                              ASTM D892                                                 0/0 mL

SAFETY DATA SHEET CLICK HEAR 

Performance Levels / OEM Approvals

PETRONAS GEO NG 40 meets or exceeds the performance requirements of:

OEM / Manufacturer Approved Engine Models / Specification

• Caterpillar CG132, CG132B, CG170, CG170B, CG260
• GE Jenbacher Class A & B Gases, Type 2, Type 3, Type 4, Type 6 Engines
• MAN M 3271-2
• MWM TR-0199-99-2015 (TCG 2016, TCG 3016, TCG 2020, TCG 3020, TCG 2032, TCG 2032B)
• Rolls-Royce B35:40, C26:33, K-G1, G2, G3, G4 Engines
• Wärtsilä 175SG, 220SG, 25SG, 28SG, 34SG, 50SG, 20DF, 32DF, 34DF, 50DF

Key Advantages

• Premium-quality SAE 40 natural gas engine oil
• Low-ash formulation (0.48%)
• Excellent engine cleanliness
• Outstanding oxidation and nitration resistance
• Superior wear and scuff protection
• Extended engine and oil service life
• Enhanced rust and corrosion protection
• Improved fuel efficiency
• Reduced engine emissions
• Suitable for catalytic converter-equipped gas engines
• Health, Safety & Environment
• Avoid prolonged or repeated skin contact.
• Wash exposed skin immediately with soap and water after contact.
• Do not discharge used oil into drains, soil, or waterways.
• Follow the Safety Data Sheet (SDS) for proper storage, handling, and disposal procedures.

Product Summary

PETRONAS GEO NG 40 is a premium SAE 40 low-ash natural gas engine oil engineered for medium- and high-speed four-cycle gas engines. Its advanced additive technology delivers excellent wear protection, engine cleanliness, oxidation stability, corrosion resistance, and long oil life. It is designed to maximize engine reliability while meeting the performance requirements of leading OEMs, including Caterpillar, GE Jenbacher, MAN, MWM, Rolls-Royce, and Wärtsilä.