Engines compliant with Euro 4, 5 and 6 emission regulations are fitted with sensitive exhaust gas after treatment systems. Indeed, Sulfur and Phosphorus inhibit catalytic converters operation leading to inefficient exhaust gas treatment; and Sulfated Ashes clog DPFs (Diesel Particulate Filters) leading to shorten regenerating cycle, quick oil aging, higher fuel consumption, and engine power loss.
VOLKSWAGEN has developed VW 504 00 and 507 00 standards for lubricants with low Sulfur, Phosphorus and Sulfated Ash contents, compatible with their after treatment systems such as catalytic converters, SCR (Selective Catalytic Reduction) and DPF, in order to guarantee a perfect durability of VAG group engines (VOLKSWAGEN, AUDI, SKODA, SEAT). These types of oils allow flexible extended drain intervals managed by vehicles on-board computer.
Viscosity grade SAE 0W-30 minimizes lubricant hydrodynamic friction, allows fuel economy benefits especially when the oil is cold.
Improves oil flow at start up, faster oil pressure build up, faster rev raisings and reach operating temperature faster.
Provides better engine response and driving comfort.
Environment friendly, this type of oil allows fuel consumption reduction and therefore minimizes greenhouse gases (CO₂) emissions.

The engine cleanliness required by VW 504 00 VW 507 00 standards is very important when it comes to flexible drain intervals varying from 30,000 and up to 50,000 km. Deposits and other combustion residues on the piston and the piston ring grooves can lead to irreversible damages for the engine such as piston wear, cylinder bore polishing and excessive oil consumption.
On vehicles running tests, MOTUL SPECIFIC 504 00 507 00 0W-30 demonstrates its superiority in terms of engine cleanliness, crucial for perfect engine protection:

Regarding engine protection, especially wear protection, MOTUL SPECIFIC 504 00 507 00 0W-30 protects your engine as demonstrated, here on the timing system, on the VW general engine wear test 650 hours: