Our oil is tough as nails and is a made in the U.S.A. synthetic
Heavy-Duty Engine Protection
Your semi deserves the best protection to prevent deterioration on rings and/or cylinder liners which will increase oil consumption, less compression, horsepower and fuel economy. Independent testing has demonstrated 4 times more protection which means less downtime and costly repairs.
Extreme Temperature Protection
Superior heat resistance compared to regular diesel oil. Also flows better in cold temperatures for easier startup while giving you maximum engine protection.
Minimize Oil Consumption
Our Max-Duty oil has less burn off which means less consumption while preventing vapors into the combustion chamber. Our oil is tough as nails!
Made in U.S.A.
We are proud of our synthetic oils which offer superior protection to vehicles, trucks, motorcycles, and boats. All Amsoil products are backed by a limited liability warranty. We are the first in synthetics, since 1972!
Click or press the button below to look up the synthetic oil for your semi.