GMC duramax diesel 2016 Supplement Manual page 50

Caution (Continued)
or blends of vegetable oil with
diesel. They could damage the
fuel system and engine, and
damages would not be covered
by the vehicle warranty.
Biodiesel blends
Use biodiesel blends that meet the
ASTM specification D6751.
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 Ultra Low
Sulfur Diesel).
Caution
Do not use blends containing
more than 20% biodiesel. Any
engine, fuel system, or exhaust
(Continued)
Caution (Continued)
after-treatment system damage
would not be covered by the
vehicle warranty.
Pumps dispensing more than
5% and up to 20% biodiesel are
required to be labeled with the
concentration of biodiesel. When
refueling with a biodiesel blend
above B5, one of the following
labels should appear on the
dispenser:
Driving and Operating
Blends containing more than 5%
and up to 20% biodiesel must
meet ASTM specification D7467
(Biodiesel blend, B6 - B20).
Biodiesel quality can vary widely.
To reduce the risk of poor quality
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