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CARDEV Oil Filtration For Engines

CARDEV Engine Oil Filtration can help improve the running and performance of your engine. Suitable for all types of engines.

All CARDEV bypass filtration is covered by our lifetime warranty *


The SDU-M8 is an engine bypass filter suitable for large engines.

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The HDU-M8 is an engine bypass filter suitable for small engines.

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The LDU-M8 is an engine bypass filter suitable for very small engines, including light commercial vehicles (LCVs).

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CARDEV SDU M8 - Engine Oil Filtration Install

Exhaust Gas Recirculating Systems in Diesel Engines

In recent years, engine manufacturers have been required to reduce the levels of nitrogen oxide (NOx) in diesel engine exhaust gases to meet current emission regulations. This has been achieved by changes in engine design that include retarding the timing, raising the piston rings, selective catalytic reduction and the use of exhaust gas recirculating (EGR).

New engine designs use EGR to control NOx emissions by recirculating exhaust gases back into the combustion chamber to be burned a second time. The amount of exhaust gas introduced into the combustion chamber displaces oxygen, creating cooler combustion. In doing this, many of the exhaust contaminants end up in the engine lubricating oil.

Diesel engine oils working in the EGR environment are now exposed to corrosive and acidic gases, particle build up and a higher level of contamination in general. These will accelerate oil degradation, with an increase in soot contamination becoming a major issue limiting the service life of the oil.