AMSOIL Full Synthetic 15W-40 Motor Oil
AMSOIL 15W-40 synthetic oil is formulated with advanced technology to create the finest motor oils for people who demand maximum preservation and performance for their engines. The result is engine protection that surpasses even the most stringent industry benchmarks. Choose from the formulations below for oil that best meets your needs.
AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil
- Outstanding extreme-pressure protection
- Delivers 6X more wear protection1
- Maintains proper viscosity (thickness)
- Minimizes oil consumption
- Maximizes fuel efficiency
- Excels in extreme temperatures
- Confidently extend drain intervals
1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 5W-30 as worst-case representation
AMSOIL 15W-40 Heavy-Duty 100% Synthetic Diesel Oil
- Delivers 4X more wear protection1
- Minimizes oil consumption
- Excels in extreme temperatures
- Helps keep trucks and equipment operating at peak performance
- Offers outstanding value
1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation
AMSOIL 15W-40 Heavy-Duty Diesel and Marine Oil
- Recommended for applications specifying API CI-4+ and prior specifications
- Controls soot and wear
- Reduces oil consumption and emissions
- Delivers maximum engine protection over extended drain intervals
- Provides outstanding protection and performance in temperature extremes
- Try Signature Series Max-Duty 15W-40 for a serious upgrade
AMSOIL 15W-40 Commercial Grade Diesel Oil
- Delivers 2X more wear protection1
- Contains greater than 50% synthetic base oil
- Provides excellent protection for an outstanding value
- Offers an upgrade over conventional diesel oil
1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222
