EL MAR® GEO
NON-DETERGENT, ASHLESS NATURAL GAS ENGINE OIL
Phillips 66® El Mar GEO is a non-detergent, ashless gas engine oil specifically designed for Ajax two-stroke cycle natural gas engines. The SAE 15W-40 viscosity grade ensures reliable performance in applications requiring low-temperature viscosity, such as cold starts and frequent start-stop cycles.
El Mar GEO delivers excellent resistance to oxidation and nitration, protecting rings and liners from wear while minimizing sludge and piston deposits for superior engine cleanliness.
Its ashless formulation keeps intake ports clean, maintaining peak engine efficiency and extending spark plug life in spark-ignited gas engines. Additionally, it is compatible with gas engines equipped with exhaust aftertreatment devices, ensuring dependable operation in modern systems.
Features & Benefits
- Ashless formulation helps minimize port deposits
- Protects against sludge and varnish formation
- Excellent resistance to oxidation and nitration
- Protects against scuffing and wear
- Protects against rust and corrosion
- Excellent water-separating properties
- Low carbon-forming tendency
- Compatible with emissions system catalysts
- Does not contain any bright stock, which can cause harmful carbon deposits
Applications
- Ajax 2-stroke cycle natural gas engines (SAE 15W-40)
- Older, horizontal-type 2-stroke cycle natural gas engines, such as those manufactured by Cooper-Bessemer and Worthington (SAE 30/40)
Technical Details
Licenses & Approvals:
El Mar GEO Oil is approved for use under the following OEM specification:- DuPont Specification A4V4
Additional Details:
| SAE Grade | 15W-40 |
| Specific Gravity @ 60°F | 0.869 |
| Density, lbs/gal @ 60°F | 7.24 |
| Color, ASTM D1500 | 2 |
| Flash Point (COC), °C (°F) | 240 (464) |
| Pour Point, °C (°F) | -40 (-40) |
| Viscosity, Kinematic | |
| cSt @ 40°C | 107 |
| cSt @ 100°C | 14.2 |
| Viscosity Index | 135 |
| Cold Cranking Viscosity, cP @(°C) | 6,400 (-20) |
| Acid Number, ASTM D974, mg KOH/g | 0.04 |
| Carbon Residue, ASTM D524, wt % | 0.1 |
| Sulfated Ash, ASTM D874, wt % | <0.01 |
| Phosphorus, wt % | 0.011 |
Licenses & Approvals:
El Mar GEO Oil is approved for use under the following OEM specification:- DuPont Specification A4V4
Additional Details:
| SAE Grade | 30/40 |
| Specific Gravity @ 60°F | 0.885 |
| Density, lbs/gal @ 60°F | 7.37 |
| Color, ASTM D1500 | 3 |
| Flash Point (COC), °C (°F) | 280 (536) |
| Pour Point, °C (°F) | -24 (-11) |
| Viscosity, Kinematic | |
| cSt @ 40°C | 133 |
| cSt @ 100°C | 13.1 |
| Viscosity Index | 91 |
| Cold Cranking Viscosity, cP @(°C) | --- |
| Acid Number, ASTM D974, mg KOH/g | 0.14 |
| Carbon Residue, ASTM D524, wt % | 0.05 |
| Sulfated Ash, ASTM D874, wt % | <0.01 |
| Phosphorus, wt % | 0.003 |