Skip to main content
Mobil Delvac 1™ Transmission Fluid 40

Mobil Delvac 1™ Transmission Fluid 40

Supreme performance transmission lubricant

Introducing Mobil Delvac 1 Transmission Fluid 40, a full synthetic, manual transmission lubricant engineered to meet some of the most demanding extended drain and original equipment manufacturer (OEM) warranty requirements.

Mobil Delvac 1 Transmission Fluid 40 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 1 Transmission Fluid 40 provides outstanding high-temperature performance, oxidation stability, wear protection and corrosion control.

The outstanding performance of Mobil Delvac 1 Transmission Fluid 40 is confirmed by 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 against the Mack TO-A Plus 500,000 mile extended service classification for Mack T300 series manual transmissions.

Mobil Delvac 1 Transmission Fluid 40 meets or exceeds the requirements of the API service MT-1 classification and is recommended by ExxonMobil for use in transmissions and gear cases where API Service GL-1 through GL-4 (non-EP) gear protection is required.

Mobil Delvac 1 Transmission Fluid 40 is recommended for use in:

  • Heavy-duty manual transmissions where extended service intervals and warranties are required
  • Commercial line haul, vocational, off-road, pick-up and delivery, and bus applications
  • As a companion with Mobil Delvac 1™ Gear Oils in rear axles for maximum component life, service efficiency and fuel economy improvement

Features and benefits

  • Excellent load-carrying and anti-wear performance helps to extend transmission life and reduce operating costs
  • Maximum protection from corrosion of copper and its alloys can extend the life of synchronizers
  • Exceptional shear stability minimizes wear during severe operation
  • Outstanding protection against deposit formation can lead to longer seal life, extended drain and service intervals
  • Optimized thermal and oxidation protection helps extend component life and improves efficiency

  • Details

    Specifications and approvals

    Mobil Delvac 1 Transmission Fluid 40 meets or exceeds the requirements of the following industry and builder specifications:

    • API MT-1

    Mobil Delvac 1 Transmission Fluid 40 has the following builder approvals:

    • Eaton PS-386
    • Mack TO-A PLUS
    • Navistar MPAPS B-6816 Type 2

    Technical details

    SAE Grade 40
    Viscosity, ASTM D 445
    cSt @ 40ºC 95.1
    cSt @ 100°C 14.8
    Viscosity Index, ASTM D 2270 163
    Pour Point, ºC (ASTM D 97) -42
    Flash Point, ºC (ASTM D 92)                     238
    Density @15º C g/ml, (ASTM D 4052) 0.825

Related products

Engine oils

Our oils can help to achieve long engine life with extended service intervals.

Heavy-duty grease

Protect hardworking parts from temperature extremes, rust and wear.

Transmission fluids

Get excellent protection against high temperature and high-speed wear.

More Mobil™ resources

Mechanic checking diesel engine oil

Mobil Delvac™ FAQs

Find answers to your product questions and more in our FAQs.

Person using global distributor locator tool

Find a distributor near you

Use our locator tool to find out where to buy Mobil Delvac™ products in your area.

Pride Transport consulting with Mobil Delvac business support.

Business support

Learn how Mobil Delvac™ heavy-duty diesel engine oils and ExxonMobil’s lubricant technology expertise can help your fleet.

Energy lives here