Every car user knows that diesel is different from petrol. However, not all drivers know why these fuels cannot be used interchangeably and why ON is cheaper. Myths and facts about the use and properties of both fuels.
Cheaper "ON"
Diesel is also a mixture of hydrocarbons but with a higher boiling point of 150-350 oC and a density of 84-99 kg/dm3. It is the only suitable liquid fuel for compression-ignition engines (Diesel). It too is defined by a special parameter, but a different one to ZI fuels, here the cetane number. This is the propensity of the fuel to self-ignite, i.e. ignite from temperature and pressure rather than from a fire source.
(LC is determined in the same way as LO, but the standard is different. In this case it is a mixture of: cetane (LC=100) and α-methylnaphthalene (LC=0).
This number is maintained in the range LC=50-90.) Depending on their origin, diesel oils differ significantly in their properties. The calorific value is comparable to petrol.
Diesel prices remain lower probably because it is obtained earlier in the crude oil refining process. Its use in heavy road traction also seems to have an impact on the price.
A gaff costs a lot...
Unfortunately, although car users are aware of the uses of both fuels, they sometimes make gaffes that end up breaking down Diesel engines. The two fuels, although appearing similar, cannot be used in reverse because the characteristics desired in ZS engines, will destroy the ZI engine through knocking combustion. In contrast, the high octane number of petrol will make self-ignition difficult or impossible.
- The smallest financial consequences if a tank is mistakenly filled with petrol instead of diesel are draining the fuel and replacing the fuel filter. This is a cost of approx. 500-700 PLN, including lost fuel," says Marek Godzieszka, Auto-Boss Technical Director. More often than not, however, the engine starts and runs temporarily, which can end in a serious and costly breakdown , he adds.
