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
