How does engine oil affect the performance of DPF filters and why is it important to choose the right engine oil for diesel engines with DPF?

DPF filter – what is it and what is it for?

Back in 1969, Daimler-Benz developed the first “soot filter” based on fibrous materials and tested in commercial vehicle exhaust systems, together with the German company MANN & HUMMELIN. The purpose in the initial phase of the development of this filter was to keep larger soot particles in the exhaust system, since it has been proven that such particles cause serious health problems.

According to statistics, as many as 91% of the world’s population lives in places where the concentration of pollutants in the air exceeds the limit values. Therefore, over the years, new technologies and devices have been developed in order to meet the increasingly stringent requirements of nature protection. Today’s vehicles pollute the air as much as 95% less than in the 1970s.

DPF filter cross section

One of the technologies for reducing environmental pollution are DPF filters (Diesel Particulate Filter) that have evolved over time – from fiber-based filters to very complex ceramic exhaust gas flow systems, with one goal – to separate all solid particles that pollute the environment and which are dangerous to our health. Such filters do their job well… until they fill up!

Why is it important to use adequate and high quality motor oil?

Car manufacturers with DPF filters are introducing a filter regeneration process that cleans and empties the filter full of solid particles. It is in this process that adequate and quality motor oil plays a very important role. The process of the regeneration process begins by raising the temperature to the limit at which concentrated soot particles burn. One way to achieve this is to inject a larger amount of diesel fuel and discharge it with exhaust gases into the DPF.

Schematic of DPF filter operation

This process causes two problems: engine oil enters the DPF along with the fuel and diesel fuel enters the oil sump. Mixing diesel fuel with engine oil reduces the viscosity of the oil, which is why such oil cannot protect engine components and lubricate them properly. It will also cause a significant drop in oil pressure with side effects on engine performance. So, those small amounts of fuel that go into the crankcase cause dilution and decomposition of the oil, which means that the oil loses its lubricating properties, removes heat less and does not protect engine parts from corrosion! Therefore, all engine oils compatible with the DPF filter must have the additional ability to retain all their properties with the effect of diluting the oil with fuel.

In addition, engine oil with a high percentage of sulfate, phosphorus and sulfur (SAPS) will not only affect the operation of the DPF filter, but will also clog the particle filter and reduce its capacity. For this reason, all engine oils must be compatible with the DPF filter, which means that they must have low levels of sulfate, phosphorus and sulfur.

MOTUL 8100 motor oils are of high quality, and some are formulated to be fully compatible with DPF filters.

If you want to protect your car’s engine and extend the life of your DPF filter, use high-quality engine oil that is compatible with the DPF filter!


Look for the following MOTUL products:

  • Motul 8100 X-clean EFE 5W30
  • Motul 8100 X-clean+ 5W30
  • Motul 8100 X-clean 5W40
  • Motul 8100 Eco-clean+ 5W30
  • Aditiv DPF clean

Motul 8100 X-clean EFE 5W30

Advanced 100% synthetic engine oil that ensures high protection of all engine parts and fuel economy. Approved by the BMW Group, General Motors, Opel, Mercedes and Volkswagen for “Extra Fuel Economy”, ie the properties of exceptional fuel economy. Specially formulated for the latest generation cars with petrol and diesel engines, with natural intake or turbocharger, direct or indirect injection.

Standards: ACEA C2 / C3, API SN

Manufacturer approvals: BMW LL-04, Opel GM dexos2 ™, MB 229.52, VW 505 01, Fiat 9.55535-S1 / S3


Motul 8100 X-clean+ 5W30

Fully 100% synthetic engine oil specially developed for the new generation of VAG (Volkswagen, Audi, Škoda and Seat) cars, as well as for Mercedes-Benz and BMW engines, petrol or diesel, EURO 4 and EURO 5 standards with flexible oil change intervals. Compatible with DPF particulate filters.

Standards: ACEA C3

Manufacturer approvals: BMW LL-04, MB 229.51, Porsche C30, VW 504 00 – 507 00.


Motul 8100 X-clean 5W40

Fully 100% synthetic motor oil for the latest generation cars. Suitable for turbo diesel engines with direct injection (common-rail or “pump-nozzle” system) or EURO 4 or EURO 5 petrol engines that require ACEA C3.

Standards: ACEA C3, SN / CF API

Manufacturer approvals: VW 502 00/505 00/505 01, BMW LL-04, Porsche A40, Ford WSS M2C 917A, MB 229.51, Opel GM dexos2 ™, Renault RN 0700, RN 0710, Fiat 9.55535-S2.


Motul 8100 Eco-clean+ 5W30

Fully 100% high performance synthetic engine oil, specially designed for car engines that require low friction, low HTHS and low levels of sulfate, phosphorus and sulfur (low SAPS). Suitable for petrol and diesel engines of the latest generation, EURO 4, EURO 5 and EURO 6 standards. Compatible with catalytic catalysts DPF soot particle filters.

Standards: ACEA C1, JASO DL-1

Manufacturer approvals: Ford WSS M2C 92C 934B, Jaguar ST JLR.03.5005


Additive MOTUL DPF CLEAN

Extremely powerful additive for all types of diesel engines with DPF filter

  • High performance additive to reduce soot
  • Reduces exhaust emissions
  • Improves engine performance, compatible with all diesel engines
  • For optimal operation of all system components and efficient engine performance
  • Helps regenerate soot particle filters
  • Improves cold start
  • It contains an additive which when added to the fuel forms a catalyst (FBC) which as such functions efficiently in the combustion chamber
  • Regenerates quickly and completely, complete soot deposits burn in 2-3 minutes (compared to a coated filter system with a burning time of 20 to 30 minutes, (very often and incomplete regeneration)
  • Positive effect on fuel consumption (possible savings of about 2-3%) due to reduced pressure in the system
  • Works with all types of diesel fuels including those with high sulfur content
  • Proven and tested on over 100,000 vehicles
  • Practical large-scale experience including OEM (Volkswagen) for more than 15 years

MOTUL is the first lubricant manufacturer in the world to invent the first multigrade engine oil back in 1953, the first semi-synthetic engine oil in 1966, and in 1971 the first in the world to start producing 100% synthetic engine oil!

If you are not sure which MOTUL engine oil is best for your car, you can find a recommendation on the MOTUL online lubricant advisor – at the link Motul Lubricant Advisor

For additional questions, advice, help, information or cooperation, contact us with confidence!

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Importers for Serbia:

MASS Company d. o. o.

Jovanke Radaković 84b
11160 Belgrade, Serbia

T +381 11 7857 000
F +381 11 7857 009
Email: [email protected]

WINT d. o. o.

Youth Brigades 102
11070 New Belgrade, Serbia

T +381 11 228 43 63
Email: [email protected]


Source: Auto magazin by www.magazinauto.com.

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