El Mar®T GEO

Very Low-AshNatural Gas Engine Oil

Phillips 66®El Mar T GEO is a high-quality, very low-ash, dispersant-detergent gas engine oil designed for use in naturally aspirated and moderately turbocharged, low- to medium-speed 2-stroke cycle and 4-stroke cycle natural gas engines.

Features & Benefits

• Field-proven performance in providing excellent engine cleanliness

• Good dispersancy protects against sludge and varnish formation

• Low-ash formulation helps minimize port deposits

• Excellent resistance to oxidation and nitration

• Protects against scuffing and wear

• Protects against rust and corrosion

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


• Low- to medium-speed, 2-stroke cycle gas engines where port plugging is a concern

• Low- to medium-speed, naturally aspirated 4-stroke cycle gas engines

• Medium-speed, 4-stroke cycle gas engines operating under moderate loads

Technical Details

Licenses & Approvals

El Mar T GEO is recommended for use in natural gas engines manufactured by:

• Ajax

• Cooper Bessemer

• Superior

• Clark

• Dresser Rand (Category I & II)

• Waukesha

• Caterpillar

Additional Details
SAE Grade30
Specific Gravity @ 60°F0.8812
Density, lbs/gal @ 60°F7.34
Color, ASTM D15003.5
Flash Point (COC), °C (°F)260 (500)
Pour Point, °C (°F)-30 (-22)
Viscosity, Kinematic
cSt @ 40°C85.6
cSt @ 100°C10.4
Viscosity Index103
Cold Cranking Viscosity, cP @ -20°C---
Sulfated Ash, ASTM D874, wt %0.15
Total Base Number (TBN), ASTM D28962.1