SOLAR 15W40 API CI-4/SL | Optima Diesel Engine Oil

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SOLAR Optima Series Diesel Engine Oils 15W40 API CI-4/SL

SOLAR Optima Series Diesel Engine Oils 15W40 API CI-4/SL

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Description

SOLAR OPTIMA 15W40 is a high-performance semi-synthetic (synthetic blend) diesel engine oil, formulated to deliver exceptional protection, durability, and performance for both diesel and gasoline engines. Meeting the API CI-4/SL specification, it provides superior wear protection, oxidation stability, and deposit control for modern and older engines.

Blended with premium synthetic and high-quality mineral base oils, along with an advanced additive system, SOLAR OPTIMA 15W40 ensures optimized fuel efficiency, extended drain intervals, and exceptional engine cleanliness even in extreme conditions. It is designed for heavy-duty commercial vehicles, off-road equipment, and high-performance gasoline engines requiring API CI-4/SL.

Available API

CH-4

CH-4/SL

Applications

Suitable for heavy-duty diesel engines in trucks, buses, and construction equipment.
Recommended for fleet vehicles, off-highway equipment, and industrial diesel engines.
Ideal for turbocharged and naturally aspirated diesel and gasoline engines.
Designed for modern emission-compliant engines, including those with EGR (Exhaust Gas Recirculation) systems.
Perfect for high-mileage engines requiring enhanced protection against wear and oil consumption.

Features & Benefits

Enhanced Wear Protection – Reduces metal wear, prolonging engine life.
Superior Oxidation & Thermal Stability – Prevents oil degradation and sludge formation.
Extended Drain Intervals – Allows for longer service periods, reducing maintenance costs.
Improved Fuel Efficiency – Low-friction formulation enhances fuel economy.
Excellent Soot & Sludge Control – Keeps engines clean for optimal performance.
Outstanding Cold-Start Protection – Ensures smooth start-ups in low temperatures.
High Shear Stability – Maintains viscosity under high loads and extreme temperatures.
Multi-Fleet Capability – Suitable for both diesel and gasoline engines.

Recommended for Vehicles & Assemblies Requiring

API CI-4, CH-4, CG-4, CF-4, CF / API SL, SJ or equivalent.
ACEA E7, E5, E3 / A3/B3, A3/B4 standards.
ILSAC GF-4 equivalent for fuel efficiency benefits.
Meets or exceeds OEM requirements for Cummins, Caterpillar, Detroit Diesel, MAN, Mercedes-Benz, Volvo, Renault Trucks, and other major diesel and gasoline engine manufacturers.

Key Properties

Physical Properties
Properties	15W40
API / ACEA Classification	API CI-4/SL, ACEA E7/E5/E3, A3/B3, A3/B4
Appearance	Bright & Clear
Specific Gravity @15°C	0.875
Flash Point °C	230
Pour Point °C	-30
Viscosity @40 °C, cSt	105.5
Viscosity @100 °C, cSt	14.5
Viscosity Index	145
Total Base No, mg KOH/g	10.2
Cold Cranking Viscosity, cP	6100 @ -20°C
HTHS viscosity @ 150 °C, mPa.s	4.1