Castrol Magnatec 5W-20 – Advanced Synthetic Protection for Petrol, Diesel & Hybrid Engines – 20 L

Replacement for Castrol EDGE 5W­20 20L

Product Overview

Castrol Magnatec 5W-20 is a premium synthetic engine oil engineered to provide intelligent, adaptive protection for modern engines subjected to frequent cold starts, dynamic thermal cycles, and demanding driving conditions. Unlike conventional engine oils that drain rapidly from internal surfaces once the engine stops, Castrol Magnatec contains advanced polar adhesion molecules that cling to critical engine components, creating a protective boundary layer that remains active before, during and after ignition. This film-forming behaviour dramatically improves the engine’s resilience to wear during the first seconds of start-up, which is the most vulnerable period of operation for any internal combustion or hybrid system.

This lubricant is specifically designed to maintain ultra-responsive oil flow in engines that require low-viscosity oils conforming to SAE 5W-20 and API SN/SP anti-wear performance levels, offering an optimal balance of shear strength, thermal stability, deposit control, and extended service capability. The 20-litre workshop grade is ideal for professional servicing, light commercial maintenance, multi-vehicle fleets, and industrial workshops that require consistent oil availability with superior anti-wear and friction control properties.

Modern engines continue evolving toward fuel-efficient, lightweight designs, hybrid powertrain compatibility, turbocharging, and tighter mechanical tolerances. These developments, while improving performance, place significantly greater stress on engine oils. Magnatec 5W-20 is engineered to counter these challenges by maintaining robust oil film integrity and frictional durability even under rapid pressure spikes, high-temperature shear zones, and sustained operation. Its formulation supports efficient pumpability at sub-zero cold-start conditions while also stabilising viscosity under heat-stress conditions, providing predictable lubrication behaviour across diverse internal engine environments.

Specifications & Approvals

Castrol Magnatec 5W-20 is formulated to meet or exceed the following high-performance industry and OEM requirements:

• API SP and API SN classification for petrol engine oil protection

• ILSAC GF-6A fuel-economy standard, delivering enhanced low-speed and high thermal wear protection

• Ford WSS-M2C960-A1 and WSS-M2C945-A compliance for modern Ford Ecoboost and hybrid engines

• Chrysler MS-6395 compatibility, suitable for many FCA group petrol engines

• Meets ACEA Anti-Wear performance targets for engines specifying lower-viscosity synthetic lubricants

• Turbocharger compatible with high oxidation stability requirements in modern light-duty and hybrid engines

• Supports vehicles equipped with advanced emission devices where manufacturer permits GF-6A oils

These specifications confirm its suitability for engines calling for 5W-20 class synthetic oils with high oxidation tolerance, improved piston cleanliness, and long-life anti-wear standards.

Key Features & Benefits

Intelligent Molecules That Cling
Advanced polar molecules bond to engine surfaces, forming a protective layer that remains active between oil changes, ensuring vital parts stay lubricated even before the oil circulates.

Cold-Start Wear Reduction
The 5W stability ensures rapid flow at cold ignition, which dramatically lowers wear created during start-up.

Hybrid Engine Compatible
Because hybrid engines cycle on/off far more frequently than conventional engines, the ability for the oil to cling to components provides better long-term durability.

Superior Friction Control
The formulation helps reduce internal resistance and frictional losses, sustaining fuel-efficiency without sacrificing protection.

Thermal & Oxidation Robustness
High temperature zones inside turbochargers, valve-actuation areas, and compression rings are protected against oxidation, thickening, and sludge buildup.

Deposit & Sludge Suppression
Active detergents keep internal components clean, allowing valves and rings to operate freely.

Engine Sound & Smoothness Improvements
Consistent film stability helps reduce mechanical noise and maintain smoother hydraulic tappet operation.

Extended Workshop Fill Compatibility
Ensures that workshops can service multiple makes/models without confusion or additive clashing.

Bulk 20 L Format Advantages
Reduced container changes, improved workshop economies, stable batch use, simplified maintenance, lower per-litre cost, and higher fill accuracy.

Recommended Engine Types

This lubricant is suitable for:

• Petrol engines including turbocharged small-displacement engines

• Hybrid powertrains prone to repeated cold-start cycling

• Light-duty diesel engines where 5W-20 oils are specified

• Small commercial fleets including courier vans and service utes that operate in Metro driving patterns

• Modern engines with low friction requirements to maintain fuel-economy without sacrificing anti-wear film strength

Industry-Wide Usability

• Automotive workshops requiring 5W-20 for multi-vehicle maintenance servicing

• Warehousing fleets containing LPG, electric, hybrid, petrol or light-duty diesel forklifts that have supplementary engines requiring low-VI oils

• Farming service sheds maintaining utes, tractors and engines requiring GF-6A compliant 5W class fluids

• Construction equipment depots servicing diesel gensets that allow GF-6A class oils

• Fleet operators looking for cost-efficient 20L workshop refill oil

• Maintenance planners centralising fluid stores for < ISO and API compatibility class > oils where 5W-20 is specified

Typical Physical Properties

Handling & Storage Advice

• Store drums and pails in a cool, dry, covered environment away from direct heat sources.

• Keep sealed when not dispensing.

• Prevent moisture ingress during storage.

• Use clean, dedicated transfer equipment.

• Do not mix with fluids of unknown or lower grades.

• Dispose of used oil in compliance with local environmental requirements.

• Shelf life up to 5 years in sealed container when stored correctly.