Black plate (21,1)
Chevrolet/GMC DURAMAX Diesel Supplement - 2013 - crc - 8/10/12
Driving and Operating
9-21
Diesel Fuel Grades
For best results use No. 2-D diesel
fuel year-round (above and below
freezing conditions) as oil
companies blend No. 2-D fuel to
address climate differences. No. 1-D
diesel fuel can be used in very cold
temperatures (when it stays below
−
18°C or 0°F); however, it will
produce a power and fuel economy
loss. Avoid the use of No. 1-D diesel
fuel in warm or hot climates. It can
result in stalling, poor starting when
the engine is hot, and damage to
the fuel injection system.
Premium Diesel Fuel
Diesel fuel corresponding to the
Engine Manufacturers Association
(EMA) Recommended Guideline on
Premium Diesel Fuel (FQP-1A)
could provide better starting, less
noise, and better vehicle
performance, but its use is not
required.
Biodiesel
What is biodiesel?
Biodiesel is a fuel produced from
vegetable oils or animal fats that
have been chemically modified to
reduce the possibility of damage to
the fuel system and engine.
Notice:
Raw vegetable oil or
other unmodified bio-oils or fats
are not biodiesel and must not be
used in your vehicle as they
could damage the fuel system
and engine.
What not to use
Do not use home-made biodiesel in
your vehicle since its quality cannot
be verified by approved scientific
methods. Home test kits are not
approved scientific methods.
Notice:
Any damage caused by
raw, unmodified, or home-made
biodiesel would not be covered
by the vehicle warranty.
Biodiesel blends
It is acceptable to use diesel fuel
containing up to 20% biodiesel
(B20). The diesel fuel portion of the
blend must meet the same
specification, ASTM D975 (Grades
No. 2-D or No. 1-D S15 commonly
known as Ultra Low Sulfur Diesel),
as other fuels used in your vehicle,
and the biodiesel used for making
this fuel must meet the latest
version of ASTM specification
D6751.
.
Pump labeling
—
Retail pumps
dispensing blends containing up
to 5% biodiesel (B5) are not
required to be labeled with the
concentration of biodiesel.
Blends up to B5 must meet
ASTM D975 (Grades No. 2-D or
No. 1-D S15 commonly known
as Ultra Low Sulfur Diesel).
