Why SAPS Levels Matter? Modern diesel engines are designed to deliver higher power, improved fuel efficiency, and lower emissions. To achieve this, they rely on after-treatment technologies such as Diesel Particulate Filters (DPFs) and catalytic converters. These systems are highly sensitive to engine oil chemistry, making SAPS levels a critical factor in oil selection.

Why SAPS Levels Matter?

Modern diesel engines are designed to deliver higher power, improved fuel efficiency, and lower emissions. To achieve this, they rely on after-treatment technologies such as Diesel Particulate Filters (DPFs) and catalytic converters. These systems are highly sensitive to engine oil chemistry, making SAPS levels a critical factor in oil selection.

Choosing the right engine oil is no longer just about lubrication-it is also about protecting emission systems and reducing total operating costs.

Understanding SAPS

SAPS refers to Sulfated Ash, Phosphorus, and Sulfur, which are present in engine oil additive systems:

• Sulfated Ash - Controls deposits but can accumulate inside DPFs.
• Phosphorus - Provides anti-wear protection but excessive levels may reduce catalyst efficiency.
• Sulfur - Aids corrosion protection but high sulfur content can negatively affect emission systems.

When SAPS levels are too high, they can lead to DPF clogging, more frequent regeneration cycles, and premature emission system wear.

Why Low SAPS Oils Are Essential

Tomoil Low SAPS oils are designed to balance engine durability with emission system protection, offering:

• Extended DPF and catalyst life through reduced ash formation
•  Lower maintenance and downtime costs
• Stable engine performance under high loads and long operating hours
•  Compliance with modern emission standards

Low SAPS formulations are especially important for turbocharged, direct-injection, and high-output diesel engines, where deposit control is critical.

Tomoil’s Low SAPS Solutions

Tomoil offers advanced Low SAPS engine oils developed to meet the demands of modern commercial and heavy-duty engines:

• Tomoil HD CK-4 Series

Designed for heavy-duty diesel engines, this Low SAPS formulation delivers excellent wear protection, oxidation resistance, and thermal stability, while helping protect DPFs and emission systems.

• Tomoil HD CJ-4/SN Series

Formulated for commercial diesel engines operating in severe conditions, this series minimizes soot and ash accumulation, supports cleaner emission systems, and ensures reliable performance across extended service intervals.

Both product lines are approved for use in engines from MAN Truck & Bus SE, Volvo Group, Cummins, Mack, and Renault, confirming compatibility with stringent manufacturer requirements.

Choosing the Right Tomoil Oil

To ensure optimal performance:

• Follow the engine manufacturer’s API and ACEA recommendations.
• Use Low SAPS oils like Tomoil HD CK-4 or CJ-4/SN for engines equipped with DPFs.

Avoid high SAPS oils where emission after-treatment systems are present.

Selecting the correct Tomoil oil helps maintain clean engines, reliable emission systems, and long-term operational efficiency.

Tomoil - Low SAPS Oils Engineered for Modern Engines and Emission Protection