Density and viscosity

The diesel fuel injection is controlled volumetrically, or by the timing of the use of the solenoid valve. Variations in fuel density (and viscosity) result in variations in engine power and, consequently, in engine emissions and fuel consumption. The European Program on Emissions, Fuels and Engine Technology found that fuel density also influences the injection timing of mechanically-controlled injection equipment, which also affects emissions and fuel consumption. Therefore, to optimize engine performance and tailpipe emissions, both minimum and maximum density limits must be defined in a narrow range.

There is no limit for diesel density in Peru, as opposed to other countries. The SGS Worldwide Fuel Survey (WWFS) results from diesel samples taken in 2012-2022 showed