Cadillac XT4 Owner Manual (GMNA-Localizing-Europe-15440913) - 2022 -
CRC - 5/13/21
266
DRIVING AND OPERATING
Owners who use little fuel, or who
have vehicles stored for extended
periods of time, should avoid the use
of biodiesel blended fuels above 5% by
volume. When vehicles are stored for
longer than one month, they should
be run out of biodiesel to below
one quarter tank, refuelled with
biodiesel-free diesel fuel, and driven
several kilometres (miles) before
storage.
Cold Weather Operation
(Diesel)
At temperatures below 0 °C (32 °F),
avoid using biodiesel blends above 5%
by volume. Using such a fuel may
cause fuel filter plugging, system
gelling, and freezing, which may
adversely affect vehicle starting.
Severe winter grade diesel fuel, such
as 1-D diesel fuel or Arctic grade
diesel fuel, can be used in extreme
cold temperatures (below -18 °C or
0 °F); however, doing so will reduce
power and fuel economy. Avoid using
severe winter grade fuel in warm or
hot climates. It may result in stalling,
poor starting, and damage to the fuel
injection system.
Fuels improperly blended for cold
temperature operation may result in
restricted fuel filters. The vehicle is
equipped with a fuel heating system
to prevent gelling or waxing of
conventional diesel fuel and biodiesel
blends, but it may not prevent all
cases.
In severe winter conditions, the fuel
filter may become clogged by wax
naturally present in the fuel. To
unclog it, move the vehicle to a warm
garage area and allow the filter to
warm up. The fuel filter may need to
be replaced. See
.
Water in Fuel (Diesel)
Improper fuel tank inspection or
cleaning, or contaminated fuel from
suppliers, may cause water to be
pumped into the fuel tank along with
the diesel fuel. If a WATER IN FUEL
message displays in the DIC, the water
must be drained immediately.
{
Warning
Diesel fuel containing water is still
combustible. You or others could be
burned. If the fuel needs to be
drained, keep sparks, flames, and
smoking materials away from the
mixture.
Caution
Water in the diesel fuel may
corrode internal components of the
fuel system and lead to severe
damage. It may also support fungus
or bacteria growth, which may
damage the fuel system. Even with
a diesel fuel biocide, the fuel system
may still need to be cleaned. Your
retailer can advise of the
appropriate solution.
If the fuel tank needs to be purged
to remove water, see your retailer or
a qualified technician. Improper
purging may damage the fuel
system.