Ah, many thanks for the explanations guys - I had, very briefly, wondered why one garage foamed whilst the other one didn't. . . but at the time I was more grateful that I could ferry some derv in by car than looking for reasons.
Its good to know what happened; I become really annoyed when I've no idea why something like this occurs - I much prefer it when all my problems can be answered, before being neatly packed away <g>, plus I'm much happier I now know that nobody actually pinched my diesel in the first place! That said, it has reminded me to look at some form of anti-theft / vandalism device for the fuel tank. Cheers, one and all, Trevor On 23/03/2010 22:46, Ian Mac wrote: > On 3/23/2010 2:58 PM, Trevor Sheppard wrote: > >> It does mean that 'fill 'er up' needs a tad more care, and time, than >> previously - but I'm a little surprised that this frothing effect has >> not been mentioned/noticed by others? >> ......... >> >> All diesel has a detergent added, its there to stop your injectors from >> clogging up and to remove soot from the cylinders. If you fill your tank >> the wrong way it will froth for fun, the design of certain hose nozzles >> encourage this, this is why the hoses for the lorry pumps are different >> from the car ones, so that the lorries can load faster. The design of >> the actual pump also differs. On our landrover whose fuel filler is >> basically just a big hole into the tank, if we fill at the local Tescos >> we only get half a tankful before the first click. but at the local >> garage on its lorry pump it fills to where you place the nozzle with >> very little foaming, and its loads quicker. >> The problem can be compounded on a car by the return breather pipe which >> sometimes spits back the foam. If you buy your fuel from a tanker, they >> have very fast nozzles but no safety stop system. so you need to be able >> to see your getting full. which is why the old narrow boats tanks had >> such bigger filler caps. >> -- >> cheers Ian Mac [Non-text portions of this message have been removed]
