Phosphorus Source & Its Impact in Heavy-Duty Diesel Engine Oils 1. Phosphorus Source in Engine Oils In heavy-duty diesel engine oils, phosphorus is primarily introduced through additive packages. The most common source is: ✔ Zinc Dialkyldithiophosphate (ZDDP) A multifunctional additive used for anti-wear, anti-oxidation, and corrosion protection. Contains zinc, sulfur, and phosphorus, making it one […]
