Black plate (21,1)
DURAMAX Diesel Engine (LML/LGH) - 2011
Driving and Operating
9-21
.
Biodiesel fuel quality degrades
with time and exposure to high
temperature much more quickly
than conventional diesel fuel.
More frequent refueling provides
the best opportunity to have a
supply of fresh fuel.
Owners who have very low fuel
usage or who have vehicles
stored for extended periods of
time should avoid the use of
biodiesel. Storage at hot ambient
temperatures will accelerate
biodiesel degradation.
When vehicles will be stored
for extended periods of time
(greater than one month), they
should be run out of biodiesel to
below 1/4 tank, refueled with
conventional Ultra Low Sulfur
Diesel fuel, and driven several
miles before storage.
.
Biodiesel gels sooner than
conventional diesel fuel at cold
temperature, and biodiesel fuel
requires proper blending for
winter time operation.
Fuels improperly blended for
cold temperature operation may
result in restricted fuel filters and
degraded vehicle performance.
Your vehicle is equipped with a
fuel heating system to provide a
level of protection against filter
plugging from gelling (waxing) of
conventional diesel fuel and
biodiesel blends. However, the
system will not prevent all cases
of plugged filters if the operating
temperature is far below the
temperature at which gelling
or waxing of the fuel occurs
(cloud point).
Use of biodiesel blends greater
than B5 (5% blend) should be
avoided in cold temperatures.
.
Vehicles operated for extended
periods of time on conventional
diesel fuel and then switched to
biodiesel blends may experience
premature fuel filter clogging and
require more frequent fuel filter
service.
With long term use of
conventional diesel fuel, gum
and varnish may be deposited
within the tank and fuel system.
These deposits, while not
problematic with the use of
conventional diesel fuel, may
become loosened with a sudden
switch to biodiesel blends and
cause fuel filter plugging.
This vehicle is equipped with a
fuel filter restriction monitoring
system that will alert you if the
fuel filter requires service, but it
will not prevent damage caused
by poor quality biodiesel.
.
Use of biodiesel blends will
degrade the performance of
your vehicle
’
s water separator.
Biodiesel reduces the
effectiveness of the vehicle
’
s
water separator, and in the event
of water contamination of the
fuel, increases the risk of
damage to the fuel system.
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