Intermittent use, prolonged storage, humidity and short drives can lead to the development of rust and corrosion, causing major damage to diesel engines. Examples of applications affected include:
• RVs
• Off-Road Equipment
• Marine
NMMA FC-W Rust Test
Developed to evaluate corrosion protection in the extreme
operating environments of marine engines, the National
Marine Manufacturers Association (NMMA) FC-W Rust Test
represents a stringent, difficult-to-pass test for any engine
oil. Metal coupons cut from actual Mercury* cylinder liners
are submerged in the test oil, placed in a salt humidity
cabinet for 24 hours and rated.
Superior Marine-Grade Rust Protection
We subjected Signature Series Max-Duty Synthetic Diesel Oil and four competitors to two rounds of testing. In order to pass the test, the average rating must be lower or equal to the reference oil average. As seen in the graph, Signature Series Max-Duty Synthetic Diesel Oil delivered a strong pass, while three competing oils failed and one was a borderline pass.
Signature Series Max-Duty Synthetic Diesel Oil provides up to 2X better rust protection1, outperforming competing diesel oils.
1Based on industry standard testing using the NMMA FC-W Rust Test
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil
- 6X more engine protection2
- Highly optimized detergent package provides the ultimate engine cleanliness and efficiency
- Extraordinary marine-grade rust protection
- Significantly exceeds industry requirements
- Full OEM specification coverage
- High TBN provides outstanding acid neutralization for long-term engine protection
- Reduces oil consumption
- Exceptional cold-temperature performance
- Top-grade protection for extended drain intervals
- Available in 5W-30, 0W-40, 5W-40 and 15W-40 viscosities
2than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222 using 5W-30 as worst-case representation
