Castrol Vecton 10W-30 FA-4 with unique System Pro Technology™ is a part-synthetic diesel engine oil that represents the latest technology heavy-duty engine oil engineered specifically for fuel economy in select 2017 and beyond model year diesel engines. It is targeted exclusively at today’s low emission, low fuel consumption trucks and buses where API FA-4 is required.

Fuel Savings and Increased Productivity

Pumping oil around the engine creates drag, which saps engine power and
increases the consumption of diesel fuel. Castrol Vecton 10W-30 FA-4 delivers a 1.5% Fuel Saving* and extended drain intervals of up to 96,000 kilometers or 770 hours.**
In addition, Castrol Vecton 10W-30 FA-4 has lower viscosity under high temperature and high shear forces. These characteristics reduce drag and save fuel, thus improving the productivity of the engine.

Adapting to Lower Emissions

New technology developments in diesel engines have led to lower emissions in heavy-duty vehicles. In turn, these advances in technology also result in increasing levels of torque within the engine, which leads to higher pressures and temperatures.
Castrol Vecton 10W-30 FA-4 with unique System Pro Technology™ adapts to increased pressure and temperature with proven shear stability and oxidation performance.


Castrol Vecton 10W-30 FA-4 offers the following benefits in support of modern diesel engine technology:
  • Excels under high pressure. Engine combustion pressures are increasing, which puts increased pressure on key engine parts. Castrol Vecton 10W-30 FA-4 with unique System ProTechnology™ is formulated to hold its viscosity under high shear contacts to extend oil life.
  • Performs at high temperature. In modern engines, engine oil is subjected to areas of very high temperature; this causes oxidation and oil thickening. Castrol Vecton 10W-30 FA-4 is formulated to fight oxidation to extend oil life.

Industry Approvals and OEM Specifications

  • API FA-4
  • Cummins CES 20087
  • DDC DFS 93K223
* In independent testing versus SAE 15W-40 CJ-4 oil using SAE J1321 test method for class 8 trucks
**In combination with and following a proper used oil analysis program like Castrol Labcheck®