AMSOIL SAE 50 Long-Life Synthetic Transmission Oil is specially formulated
to meet the demanding requirements of manual transmissions found
in high-torque, heavy-duty line-haul trucks and other commercial applications.
Its synthetic base oils and premium additives help reduce wear (see photos), improve shifting and extend transmission
life throughout drain intervals of up to 500,000 miles/five years. Compared
to conventional fluids, Long-Life Synthetic Transmission Oil can help operators
reduce maintenance costs and increase productivity.
Resists Wear
AMSOIL Long-Life Synthetic
Transmission Oil’s synthetic base oils
withstand the pressures of high-load,
high-torque applications. As a result, it
resists viscosity loss due to mechanical
shear to provide a durable lubricating
fluid film for increased wear resistance
and longer transmission life.
To prove its effectiveness, AMSOIL
installed SAE 50 Long-Life Synthetic
Transmission Oil in line-haul trucks and
placed them into real-world service. After more than 500,000 miles, a transmission
was disassembled and inspected by a
calibrated ASTM rater. Results reveal
Long-Life Synthetic Transmission Oil
provided outstanding wear protection in
all critical components (see images).
Year-Round Performance
AMSOIL Long-Life Synthetic
Transmission Oil’s high viscosity index
translates into better high- and low-temperature
performance compared
to conventional fluids. In cold weather,
it provides easier shifts and reduced
fluid drag for increased fuel economy.
Its exceptional thermal stability inhibits
chemical breakdown and sludge
formation at high operating temperatures
to help transmissions run cleaner.
Inhibits Foam
Churning gears introduce air into the
fluid, causing foam. When bubbles
between gear surfaces collapse, metal-to-metal contact and increased wear
result. Long-Life Synthetic Transmission
Oil contains foam inhibitors to ensure
formation of a strong lubricating film and
excellent wear protection.

Seal Friendly
Long-Life Synthetic Transmission Oil is
compatible with seals to help prevent
leaks and extend seal life.
Applications
AMSOIL SAE 50 Long-Life Synthetic Transmission Oil is
excellent for use in manual transmissions requiring an SAE 50
lubricant found in heavy-duty equipment. It is recommended
for applications specifying any of the following:
- Eaton* PS-164 Rev. 7
- API GL-1 and MT-1
- Navistar*/International* TMS 6816
- Mack* TO-A Plus
- ZF* Freedomline
- Meritor* 0-81
- Rockwell*/Eaton/Fuller* CD-50 (PS-081)
Service Life
Follow the OEM drain interval for synthetic oil up to 500,000
miles or five years, whichever comes first.
AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty. For complete information
visit www.amsoil.com/warranty.aspx.
HEALTH AND SAFETY
This product is not expected to cause health concerns when used for the intended
applications and according to the recommendations in the Safety Data Sheet (SDS).
An SDS is available online at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Recycle used oil and bottle.
*All trademarked names and images are the property of their respective owners and may be
registered marks in some countries. No affiliation or endorsement claim, express or implied,
is made by their use. All products advertised here are AMSOIL-engineered for use in the
applications shown.