Paccar PX 8, Operator'S Manual

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Maintenance Specifications
PACCAR Y53-1030A 12/09
– 61 –
The following chart lists acceptable types of fuels for this
engine.
NOTE: PACCAR recommends that the cetane num-
ber of diesel fuel be a minimum of 45 for engines
that are expected to operate at temperatures below
0°C (32°F) and a minimum of 42 for engines that are
operated at temperatures above 0°C (32°F). NOTE: Using diesel fuel with a lower than recom-
mended cetane number can cause hard starting,
instability, and excessive white smoke. To maintain
satisfactory operation at low ambient temperatures,
it is important to specify diesel fuel of the correct cet-
ane number.
Acceptable Types of Fuels
Number 1D
Diesel
ab
Number 2D
Diesel
b
Number 1K
Kerosene
Jet-A Jet-A1 JP-5 JP-8 Jet-B JP-4 CITE
OK OK NOT OK NOT OK NOT OK NOT OK NOT OK NOT OK NOT OK NOT OK
48-34
c
40-24
c
50-35
c
51-37
c
51-37
c
48-36
c
51-37
c
57-45
c
57-45
c
57-45
c
a. Any adjustment to compensate for reduced performance with a fuel system using alternate fuel is not warrantable.
b.
Winter blend fuels, such as found at commercial fuel dispensing outlets, are combinations of number 1D and number 2D diesel fuel and are
acceptable.
c. BTU Content/Degree API Gravity - Low API gravity fuels have a higher thermal energy content (BTU). As a general rule, there is a 3 to 5 per-
cent decrease in BTU content for every 10 degree increase in API gravity, there is also a 0.7 degree API gravity increase with an increase in
fuel temperature. This decrease in energy content equates roughly to the same percentage of power loss. Use of fuels with higher API gravity
will cause higher than normal fuel consumption.