Mobil Delvac™ Synthetic Transmission Fluid 50

Mobil commercial-vehicle-lube , New Zealand

Supreme Performance Transmission Lubricant

Product Description

Mobil Delvac Synthetic Transmission Fluid 50 is a fully synthetic, manual transmission lubricant engineered to meet the most demanding extended drain and OEM warranty requirements. It is recommended for year-round lubrication of manual transmissions in light to severe duty on- and off-highway equipment operating in a wide range of environments. Designed to provide maximum protection and extended operating life to heavy duty transmissions, Mobil Delvac Synthetic Transmission Fluid 50 provides significant advantages over conventional sulphur-phosphorus gear oils, including outstanding high-temperature performance, oxidation stability, wear protection, and corrosion control.

It has the same viscosity as most SAE 50 engine oils and SAE 90 gear lubricants at the high end of the temperature-viscosity scale, and because of its inherently high viscosity index, it provides stronger film strength at higher temperatures than conventional oils. Mobil Delvac Synthetic Transmission Fluid 50 also ensures effective lubrication at below freezing temperatures without channelling.

The outstanding performance of this product is confirmed by its approval for heavy-duty transmissions covered by Eaton Roadranger and Extended Warranties of 750,000 miles, with oil drains of 500,000 miles. It is also approved by Mack against its TO-A Plus 500,000 mile extended service classification. Mobil Delvac Synthetic Transmission Fluid 50 meets or exceeds the requirements of the API service MT-1 EP gear oil service classification and is recommened by ExxonMobil for use in transmissions and gear cases where API Service GL-1 through GL-4 gear protection is required.


Features and Benefits

The performance capabilities of today's heavy-duty on- and off-highway equipment have vastly improved in terms of load, speed, control, and reliability through innovative powertrain designs. These designs have markedly increased the demands on transmission lubricants, requiring them to deliver higher levels of performance while extending drains. For heavy-duty transmissions, friction control, wear protection, thermal stability, shear stability, rust and corrosion protection, and seal protection are features that must be balanced to provide extended gear and synchroniser life, smooth shift control, improved efficiency, and higher load capability over a wide range of applications and operating environments. Mobil Delvac Synthetic Transmission Fluid 50 delivers unequalled performance in today's manual transmissions. The key benefits include:



Advantages and Potential Benefits

Excellent load carrying, anti-wear, and EP performance

Extends transmission life and reduces cost of operation

Outstanding protection against deposit formation

Longer seal life, extended drain and service intervals

Maximum protection from corrosion of copper and its alloys

Protects and extends the life of synchronizers

Optimized thermal and oxidation protection

Extends component life and improves efficiency

Exceptional shear stability

Minimizes wear during severe operation

Outstanding low-temperature fluidity

Reduces wear during cold temperatures and improves shifting with quicker starts

Extended drain and service interval capability

Provides lower operating costs and higher productivity

Improved friction reduction properties

Improves fuel economy and lowers operating costs



Recommended by ExxonMobil for use in:

     •  Heavy-duty manual transmissions where extended service intervals and warranties are required

     •  On-highway, commercial light and heavy duty trucking, buses, and vans

     •  Off-highway industries including construction, mining, and agriculture

     •  Use as a companion with Mobil Delvac Synthetic Gear Oils in rear axles for maximum component life, service efficiency, and fuel economy improvement

     •  NOT suitable for hypoid gear applications in differentials and final drives, either for topping-off or refills, where API service GL-5 or MIL-PRF-2105E lubricants are specified


Specifications and Approvals

This product has the following builder approvals:

International TMS-6816

Mack TO-A Plus

ZF Freedom Line


This product is recommended by ExxonMobil for use in applications requiring:

EATON PS 164 Rev 7


This product meets or exceeds the requirements of the following industry and builder specifications:



Properties and Specifications




SAE 50

Density @ 15.6 C, g/ml, ASTM D4052


Flash Point, °C, ASTM D92


Kinematic Viscosity @ 100 C, mm2/s, ASTM D445


Kinematic Viscosity @ 40 C, mm2/s, ASTM D445


Pour Point, °C, ASTM D97


Viscosity Index, ASTM D2270



Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @

All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries unless indicated otherwise.


Mobil Oil New Zealand Limited
164-188 Beaumont St
New Zealand

+ 64 4 498 4000

Typical Properties are typical of those obtained with normal production tolerance and do not constitute a specification.  Variations that do not affect product performance are to be expected during normal manufacture and at different blending locations.  The information contained herein is subject to change without notice. All products may not be available locally. For more information, contact your local ExxonMobil contact or visit
ExxonMobil is comprised of numerous affiliates and subsidiaries, many with names that include Esso, Mobil, or ExxonMobil. Nothing in this document is intended to override or supersede the corporate separateness of local entities. Responsibility for local action and accountability remains with the local ExxonMobil-affiliate entities.