Renault Forums :: Independent Renault forum - View Single Post - SHELL V-POWER Diesel

View Single Post
post #8 of (permalink) Old 27th July 2007
Technical Supremo

Join Date: Feb 2007
Posts: 42,940
Nominated 16 Times in 67 Posts
Nominated TOTW/F/M Award(s): 28
Thanks: 372
Thanked 5,201 Times in 4,712 Posts
Modern common rail 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 oil 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.
madnoel10 is offline  
For the best viewing experience please update your browser to Google Chrome