SOLAR 20W50 API CI-4/SL | 20W50 API CI-4/SL Engine Oil

You are here:

Home
Automotive
Diesel Engine Oil
Optima Series
SOLAR Optima Series Diesel Engine Oils 20W50 API CI-4/SL

SOLAR Optima Series Diesel Engine Oils 20W50 API CI-4/SL

Description

SOLAR OPTIMA 20W50 is a high-performance semi-synthetic (synthetic blend) diesel engine oil, designed to deliver enhanced engine protection, excellent thermal stability, and superior wear resistance for both diesel and gasoline engines. Formulated to meet the API CI-4/SL specifications, this oil provides outstanding deposit control, reduced engine wear, improved oxidation resistance, and superior soot handling, ensuring optimal engine cleanliness and longevity.

Blended with premium synthetic and mineral base oils, SOLAR OPTIMA 20W50 offers extended drain intervals, high shear stability, and excellent lubrication under high-temperature and heavy-load conditions, making it ideal for commercial fleets, heavy-duty trucks, and industrial diesel and gasoline engines.

Available API

CH-4

CH-4/SL

Applications

Recommended for heavy-duty diesel engines in trucks, buses, and construction equipment.
Suitable for fleet vehicles, agricultural machinery, and industrial diesel engines.
Ideal for turbocharged and naturally aspirated diesel and gasoline engines.
Designed for modern engines with Exhaust Gas Recirculation (EGR) and Selective Catalytic Reduction (SCR) systems.
Perfect for high-mileage engines requiring superior protection against wear and oil consumption.

Features & Benefits

Superior Wear Protection – Reduces engine friction and enhances durability.
Enhanced Oxidation & Thermal Stability – Prevents oil breakdown and sludge buildup.
Extended Drain Intervals – Optimized for longer engine life and reduced maintenance.
Excellent Soot & Sludge Control – Keeps engines clean and efficient.
High Viscosity Index – Ensures optimal performance across a wide temperature range.
Superior High-Temperature Protection – Ideal for heavy-duty and high-load applications.
Multi-Fleet Compatibility – Suitable for both diesel and gasoline engines.
Improved Fuel Efficiency – Low-friction formula helps reduce fuel consumption.

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 leading engine manufacturers.

Key Properties

Physical Properties
Properties	20W50
API / ACEA Classification	API CI-4/SL, ACEA E7/E5/E3, A3/B3, A3/B4
Appearance	Bright & Clear
Specific Gravity @15°C	0.885
Flash Point °C	235
Pour Point °C	-24
Viscosity @40 °C, cSt	140.5
Viscosity @100 °C, cSt	18.2
Viscosity Index	145
Total Base No, mg KOH/g	10.5
Cold Cranking Viscosity, cP	8000 @ -15°C
HTHS viscosity @ 150 °C, mPa.s	4.5