To echo John Kennedy's comments: we have seen so much evidence through the years in 6.5TD's exhibiting corrosion, damaged pumps and injector units, from free water I feel it so important to 'lock up' water in emulsion, preventing/minimizing free water drop out in the system. As has been discussed here in depth, once a vehicle begins to move, the agitation will bring free water back into semi-emulsion. The water may well make it through the seperator as it is in loose emulsion state. However, if the vehicle is shut down and allowed to sit for a period, once again the water will settle out, this time in the injector pump without chemical emulsion enhancement. Scored pumps, damaged pumps, etc. etc.. This has been the case again and again with the 6.5TD's. I have been in shops with as many as 5 6.5's at a time waiting for completely new fuel systems from corrosion damage.. Free water damage.
Through the magic of chemistry we can lock up free water and prevent its damaging affects.
Engine manufacturer's must of course equip new vehicles with a free water removal system as 90% of end users will not be using any form of emulsifier, or any additization at all! Using emulsifying agents is contrary to what the engine manufacturer's can even think about recommending. Could you imagine buying a new vehicle and page one in the owner's manual says "do not operate this vehicle without using appropriate emusifying fuel additization".. So, they must go with some form of rudimentary water separator, etc.
And it is certainly nice to have it there "just in case". That said, it is a great insurance policy to use additization that will eliminate normal water damage from our fuel systems AND provide all the other additive benefits such as lubricity enhancement, cetane improvement, cold flow and injector detergency...
George Morrison, STLE CLS

[ 11-06-2002: Message edited by: george morrison ]

[ 11-06-2002: Message edited by: george morrison ]</p>