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Conference terri::cars_uk

Title:	Cars in the UK
Notice:	Please read new conference charter 1.70
Moderator:	COMICS::SHELLEYELD

Created:	Sun Mar 06 1994
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	2584
Total number of notes:	63384

2203.0. "Detergent In Diesel?" by CHEFS::CURRIEI (Dyslexic snice brith) Wed Jan 12 1994 13:52

    Sainsbury's have made a big thing about adding detergent additives to 
    their petrol - but not, apparently, to their diesel. (Notices behind 
    the counter refer to Leaded, Unleaded and Super Unleaded only.)  Can 
    anyone tell me:
    
    * Is there any reason why Diesel engines don't require detergent?
    
    * Do any other suppliers add detergent (e.g. Esso's Diesel 2000)?
    
    I saw an interesting newspaper article before Christmas (in The Times?) 
    which included a description of an independent test where two cylinders 
    of an engine (on a testbench) were run on petrol with detergent, and 
    the other two cylinders of the same engine on petrol without.  There 
    was a picture of the valve stems after the test.  After a surprisingly 
    low number of hours (I forget how many), the stems of the cylinders 
    without additive were very heavily fouled with gunge, while the other 
    two were virtually spotless.  Hence my interest in finding out whether 
    this would be applicable to diesels.
    
    Ian

T.R	Title	User	Personal Name	Date	Lines
2203.1		PAPERS::CORNE	John Corne - Product & Technology group	`Wed Jan 12 1994 15:27`	8
	re.0, >>Is there any reason why Diesel engines don't require detergent? Of course - they are clean enough already. All the dirt comes out the exhaust :-) Jc
2203.2	Ha Ha	WOTVAX::MACDONALDI	Stalybridge Celtic	`Wed Jan 12 1994 17:41`	10
	re: -1 A classic one liner response. Made me laugh for ages. im
2203.3	No Reply?	CHEFS::CURRIEI	Dyslexic snice brith	`Fri Jan 21 1994 00:11`	12
	Was my original question too boring/difficult/abstruse for a meaningful reply? Where are all the Petrol-heads (or should that be Diesel-heads) with the answers at their finger-tips? Ian PS - Thinks...maybe they've all been right-sized (downsized, capsized...etc). Maybe anybody caught Noting is automatically made redun AAAAGGGGHHHH!
2203.4		COMICS::SHELLEY		`Fri Jan 21 1994 09:27`	8
	Ian, apologies for the lack of tech assist these days but there yer go. The fact that diesel engines last twice as long as their petrol counterparts (with regular oil and filter changes) shows that the need for 'detergents' would have limited benifit in the fuel (IMO or course). Royston
2203.5	Not just long life.	FUTURS::SAXBY	Is it friday yet?	`Fri Jan 21 1994 09:32`	6
	I don't know about longevity, but isn't one of the main advantages of detergent in petrol supposed to be more efficient running which must be of interest to those smog-heads amongst us. :^) Mark
2203.6	Ummmmmmmm......	CGOOA::PITULEY	Ain't technology wonderful?	`Tue Jan 25 1994 14:35`	7
	Correct me if I'm wrong (I'm sure you will) but isn't one of the major components of diesel kerosene? And isn't kerosene a rather good cleaner all on its own? Brian
2203.7	On the other hand, I could be quite wrong - I often am! 8-)	CMOTEC::POWELL	Nostalgia isn't what it used to be, is it?	`Wed Jan 26 1994 08:43`	10
	As far as I know, Diesel is a waste product after all the usable things are taken out of the crude oil. This would mean that Kerosene would NOT be a constituent part of Diesel. I read many years ago that if Diesel couldn't be sold as a "propellant fuel" for engines, that the only thing it is good for is straight forward burning, ie. as a boiler fuel. Malcolm.