Low in saturated fat means clean arteries for people and clean fuel filters for diesel engines, resulting in superior cold weather performance.

4.3.1. Non-emission-related scheduled maintenance which is reasonable and technically necessary (e.g. oil change, oil filter change, fuel filter change, air filter change, cooling system maintenance, idle speed adjustment, governor, engine bolt torque, valve lash, injector lash, timing, adjustment of the tension of any drive-belt, etc) may be performed on engines or vehicles selected for the service accumulation schedule at the least frequent intervals recommended by the manufacturer to the owner (e.g. not at the intervals recommended for severe service).

As a check on the efficiency of the process, the chemical oxygen demand (COD) or the dissolved organic carbon (DOC) of the glass fibre filtered effluent accumulated in vessel F and of the filtered synthetic sewage in vessel A is measured at least twice per week.

The use of particulate filters also requires the use of low sulphur fuel and the Commission will present the necessary legislation in this field in due course.

Sulphur in fuels can impair the effectiveness of several existing and emerging automotive technologies such as three-way catalytic converters, oxidation catalysts, NOx Storage Traps (NSTs) and particulate traps.

As a check on the efficiency of the process the chemical oxygen demand (COD), or the dissolved organic carbon (DOC) of the glass fibre filtered effluent accumulated in vessel F and of the filtered synthetic sewage in vessel A is measured at least twice per week.