Water In Fuel; Biocides - Isuzu NPR 2008 Owner's Manual

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NOTICE: Do not use home heating oil or gasoline in your diesel
engine; either may cause engine damage.
The addition of kerosene will not unplug a filter plugged with wax.
Warming a "waxed" filter to a temperature of 32°F to 50°F (0°C to 10°C) will
return the wax to solution. Filter replacement is not normally required.

Water in Fuel

During refueling, it is possible for water (and other contaminants) to
be pumped into your fuel tank along with the diesel fuel. This can
occur if a service station does not regularly inspect and clean its fuel
tanks, or if a service station receives contaminated fuel from its
supplier(s).
To protect your engine from contaminated fuel, there is a water
separator system on the engine which allows you to drain excess
water from the fuel.
CAUTION: The drained water/diesel fuel mixture is flammable, and
could be hot. To help avoid personal injury or death and/or
property damage, do not touch the fuel coming from the water
separator drain valve, and do not expose the fuel to open flames or
sparks.
Be sure you do not overfill the drain pan. Heat (such as from the
engine) can cause the fuel to expand. If the container is too full,
fuel could be forced out of the pan. This could lead to a fire and the
risk of personal injury and/or vehicle damage.

Biocides

In warm or humid weather, fungus, and/or bacteria may form in
diesel fuel if there is water in the fuel.
NOTICE: Fungus or bacteria can cause fuel system damage by
plugging the fuel lines, fuel filters or injector. They can also cause
fuel system corrosion.
If fungus or bacteria has caused fuel system problems, you should
have your authorized dealer correct these problems. Then, use a
diesel fuel biocide to sterilize the fuel system (follow the biocide
manufacturer's instructions). Biocides are available from your dealer,
service stations, parts stores and other automotive places. See your
authorized dealer for advice on using biocides in your area and for
recommendations on which biocides you should use.
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