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injection diesels can run on reduced sulphur levels simply because their fuel system has fewer moving parts - whereas the old multi-port system had valves rotors, etc. Diesels engines are generally much more forgiving and can run (albeit not very well) when it comes to low cetane levels but the higher the cetane level the more efficient the fuel can burn. It must be remembered petrol in a petrol engine is detonated (exploded if you like) whereas diesel is burned (a much slower process) - so by upping the cetane level the burning not only happens faster but also more efficiently. To give an example it a bit like throwing paraffin onto a bonfire. It's not the cetane that gives the extra oomph but it helps the hydrocarbons to combust much more readily. Here endeth todays science lesson.
On vintage tractors and the like it is quite common to add lube
or additives to reduce wear as modern diesel has less lubrication qualities.
Currently in madnoel10's garage:
Honda Civic 1.4l
Last edited by madnoel10; 27th July 2007 at 04:23 PM.