Here's something most fleet managers don't realize: the sulfated ash in engine oil is a DPF's worst enemy. When European emission standards introduced diesel particulate filters in the mid-2000s, manufacturers discovered a problem—traditional engine oils contained additives rich in sulfated ash, phosphorus, and sulfur (SAPS). These compounds would burn during combustion and accumulate in the DPF, clogging it in as little as 50,000 km.
The solution? "Low SAPS" formulations that drastically reduce ash-forming additives while maintaining protection. This wasn't easy—engineers had to completely redesign additive packages using alternative chemistry that wouldn't sacrifice wear protection or extend drain intervals.
The result is oils that keep DPFs clean for 150,000+ km between regenerations, saving thousands in maintenance costs. Modern formulations like Hexol SYNLINE UltraTruck 5W30 use this exact low-SAPS technology to protect both engines and emission systems.
