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Description
Mobil Delvac Modern™ 15W-40 Super Defense — Diesel Engine OilFleet & Transport Mining Industry All Engine Oils Mobil Delvac Modern Series Extra High Performance Diesel Engine Oil Mobil Delvac Modern 15W 40 Super Defense Synthetic Technology Diesel Engine Oil SAE 15W 40 Mixed Fleet & Off Highway 15W 40 SYNTHETIC TECHNOLOGY TBN 11 mgKOH g Mixed Fleet On & Off Highway Replaces Delvac MX Synthetic Technology Base Stocks Higher TBN Reserve Mobil Delvac Modern 15W 40 Super Defense replaces Mobil Delvac MX 15W 40 as
Synthetic Technology Base Stocks — Higher TBN Reserve
Mobil Delvac Modern 15W-40 Super Defense replaces Mobil Delvac MX 15W-40 as Orbit Industrial's recommended extra high performance diesel engine oil — combining synthetic technology base stocks with a progressive additive system for superior control of soot-related oil thickening and outstanding resistance to oxidation, corrosion and high-temperature deposits.
The reformulation increases Total Base Number from 9.2 to 11 mgKOH/g — a meaningful improvement in acid neutralisation capacity, particularly relevant for South African fleets running on higher-sulphur diesel. For mixed fleet operators, mining contractors and off-highway equipment operators, Mobil Delvac Modern 15W-40 Super Defense is the correct choice where extended engine life, soot control and broad OEM coverage are the priority.
Product Overview
Mobil Delvac Modern™ 15W-40 Super Defense is an extra high performance diesel engine oil that provides excellent lubrication of today's diesel engines, promoting extended engine life. It meets or exceeds the specifications of virtually all major European and American engine manufacturers, with extra high performance proven in the field across a wide variety of industries, applications and mixed fleets.
The advanced chemistry of this product provides outstanding performance in both modern, demanding low-emission diesel engines and older diesel engines operating on low or high sulphur fuel. Mobil Delvac Modern 15W-40 Super Defense combines a blend of synthetic technology base stocks with a progressive additive system to provide superior control of oil thickening due to soot build-up and high temperatures, as well as outstanding resistance to oxidation, corrosion and high temperature deposits.
Recommended by ExxonMobil for naturally aspirated and turbo-charged diesel powered equipment from leading Japanese, European and American manufacturers, on-highway light and heavy-duty trucking, off-highway construction, mining, quarrying and agricultural equipment, and mixed fleet operations. Available in 5L, 20L, 208L drum and bulk tanker from Orbit Industrial — distributing Mobil lubricants across the Western Cape and Northern Cape.
Why Mobil Delvac Modern™ 15W-40 Super Defense
High Thermal & Oxidation Stability
Reduced sludge build-up, deposits and viscosity increase — maintaining oil integrity under the higher thermal stress of modern tighter engine designs and higher-positioned piston fire rings.
TBN Reserves — Now 11 mgKOH/g
Improved deposit control and acid neutralisation versus the previous Delvac MX formulation — critical for South African fleets operating on higher-sulphur diesel fuel throughout the drain interval.
Stay-In-Grade Shear Stability
Wear protection and viscosity control maintained under mechanical shear stress — preserving the optimal oil film thickness between moving components throughout the service interval.
Improved Soot Handling
Improved viscosity control and used oil pumpability — preventing soot agglomeration that causes filter plugging and abrasive wear in modern low-emission diesel engines.
Excellent Low-Temperature Properties
Pour point of -33°C and CCS viscosity of 5,700 mPa.s at -20°C provides reliable start-up wear protection and rapid oil circulation on cold starts.
Component & Seal Compatibility
Advanced detergency and dispersancy keep engines cleaner for longer, with seal and gasket compatibility reducing non-scheduled maintenance across mixed fleet operations.
Recommended Applications
OEM Approvals & Industry Specifications
Source: ExxonMobil Product Data Sheet, March 2025 / June 2026. Always confirm the correct specification against your engine OEM service manual before ordering.
Technical Properties
| Property | Test Method | Value |
|---|---|---|
| SAE Grade | — | 15W-40 |
| Kinematic Viscosity @ 100°C | ASTM D445 | 14.3 mm²/s |
| Viscosity Index | ASTM D2270 | 133 |
| Total Base Number (TBN) | ASTM D2896 | 11 mgKOH/g |
| Flash Point (Cleveland Open Cup) | ASTM D92 | 223°C |
| Pour Point | ASTM D97 | -33°C |
| Cold-Cranking Simulator @ -20°C | ASTM D5293 | 5,700 mPa.s |
| Density @ 15°C | ASTM D4052 | 0.87 kg/m³ |
| Ash, Sulfated | ASTM D874 | 1.3 mass% |
Source: ExxonMobil Product Data Sheet, March 2025. Typical properties — not guaranteed specifications.
Bulk Supply & Fleet Procurement
Available Pack Sizes
5 Litre
Retail / small fleet
20 Litre
Workshop supply
Orbit Industrial supplies the industrial, mining, marine and fleet sectors with high-volume Mobil™ lubricant solutions across the Western Cape and Northern Cape. We support B2B tenders, government procurement and large-scale fleet operations with competitive bulk pricing, reliable stock and logistical support. Request a fleet assessment & bulk quote →
Technical Documentation
Mobil Delvac Modern™ 15W-40 Super Defense — Technical Datasheet
ExxonMobil · Orbit Industrial
For Safety Data Sheet (SDS) visit msds.exxonmobil.com → Contact Orbit Industrial for application-specific technical support and fleet assessment.
Orbit Industrial Supplies distributes genuine Mobil™ lubricants, engine oils, hydraulic fluids, greases and industrial lubricants to the mining, construction, agriculture, transport, marine and manufacturing sectors across the Western Cape, Northern Cape, Garden Route and Gauteng. Bulk supply, contract pricing and technical support available. Request a quote →
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy