El Mar®LA4 EXD

Next-Generation, Low-Ash Natural Gas Engine Oil

Phillips 66®El Mar LA4 EXD is a premium quality, next-generation, low-ash, dispersant-detergent gas engine oil designed for use in high-output 4-stroke cycle and some 2-stroke cycle natural gas engines operating under severe conditions. It is particularly recommended for use in stoichiometric and lean-burn gas engines fueled by natural gas or LPG, which typically are found on crude oil and gas transmission pipelines, electrical power generators, gas compressors, irrigation water pumps and well drilling rigs.

Features & Benefits

• Proven extended-drain capability for reduced maintenance costs and maximum productivity

• Field-proven performance in providing outstanding engine cleanliness

• High dispersancy protects against sludge and varnish formation

• Outstanding resistance to oil oxidation and nitration

• Enhanced protection against piston scuffing and ring and liner wear

• Excellent protection against rust and corrosion

• Low-ash formulation protects against valve stem deposits and valve recession

• Compatible with emissions system catalysts

• Does not contain any bright stock, which can cause harmful carbon deposits


• Turbocharged, lean-burn and naturally aspirated 4-stroke cycle and some 2-stroke cycle natural gas engines where the manufacturer specifies a low ash gas engine oil meeting API CF or API CD performance requirements

• Some gas engines burning landfill gas containing minimal levels of hydrogen sulfide

Technical Details

Licenses & Approvals

El Mar LA4 EXD is recommended for use in natural gas engines manufactured by:

• Caterpillar

• Climax

• Colt-Fairbanks Morse

• Cooper Bessemer

• Dresser Rand (Category I, II, III)

• GE Jenbacher

• Minneapolis-Moline

• Nordberg

• Superior

• Wartsila

• Waukesha

• Worthington

Additional Details
SAE Grade30
Specific Gravity @ 60°F0.877
Density, lbs/gal @ 60°F7.3
Color, ASTM D15004.5
Flash Point (COC), °C (°F)254 (489)
Pour Point, °C (°F)-36 (-33)
Viscosity, Kinematic
cSt @ 40°C89.4
cSt @ 100°C11
Viscosity Index109
Cold Cranking Viscosity, cP @(°C)---
Sulfated Ash, ASTM D874, wt %0.5
Total Base Number (TBN), ASTM D28965.5
Phosphorus, wt %0.028
Zinc, wt %0.033