Jeep Grand Cherokee 2018 Manual page 51

Biodiesel is a fuel produced from renewable
resources typically derived from animal fat,
rapeseed oil (Rapeseed Methyl Ester (RME)
base), or soybean oil (Soy Methyl Ester (SME or
SOME) base).
Biodiesel fuel has inherent limitations which
require that you understand and adhere to the
following requirements if you use blends of
Biodiesel between 6% and 20% (B6–B20).
There are no unique restrictions for the use of
B5.
CAUTION!
Use of blends greater than 20% is not ap-
proved. Use of blends greater than 20% can
result in engine damage. Such damage is not
covered by the New Vehicle Limited War-
ranty.
Biodiesel Fuel Properties — Low Ambient
Temperatures
Biodiesel fuel may gel or solidify at low ambient
temperatures, which may pose problems for
both storage and operation. Precautions can be
necessary at low ambient temperatures, such
as storing the fuel in a heated building or a
heated storage tank, or using cold temperature
additives.
Fuel Quality — Must Comply With ASTM
Standards
The quality of Biodiesel fuel may vary widely.
Only fuel produced by a BQ9000 supplier to the
following specifications may be blended to meet
Biodiesel blend B6 – B20 fuel meeting ASTM
specification D-7467:
• Petrodiesel fuel meeting ASTM specification
D-975 and Biodiesel fuel (B100) meeting
ASTM specification D-6751
Fuel Oxidation Stability — Must Use Fuel
Within Six Months Of Manufacture
Biodiesel fuel has poor oxidation stability which
can result in long term storage problems. Fuel
produced to approved ASTM standards, if
stored properly, provides for protection against
fuel oxidation for up to six months.
Fuel Water Separation — Must Use Mopar
Approved Fuel Filter Elements
Biodiesel fuel has a natural affinity to water and
water accelerates microbial growth. Your Mopar
filtration system is designed to provide adequate
fuel water separation capabilities.
Fuel In Oil Dilution — Must Adhere To
Required Oil Change Interval
Fuel dilution of lubricating oil has been observed
with the use of Biodiesel fuel. Fuel in oil must not
exceed 5%. To ensure this limit is met your oil
change interval must be maintained with in the
suggested schedule. The regular use of bio-
diesel between 6% and 20% requires intervals
shorter than the outlined 10,000 miles and must
not exceed the suggested schedule. When rou-
tinely operating on biodiesel between 6% and
20%, oil and filter replacement intervals must
not exceed 8,000 Miles or 6 months, which ever
comes first.
Biodiesel Fuel Filter Change Intervals
The use of biodiesel requires more frequent fuel
filter change intervals. When operating on bio-
diesel between 6% and 20%, fuel filter replace-
ment intervals should be every second oil
change, and must not exceed 16,000 miles
(25 750 km).
NOTE:
Under no circumstances should oil change in-
tervals exceed 8,000 miles (12,875 km) or
6 months, if regular operation occurs with 6% -
20% biodiesel blends. Under no circumstances
should fuel filter replacement intervals exceed
every second oil change and must not exceed
16,000 miles (25 750 km), if regular operation
occurs with 6% - 20% biodiesel blends. Failure
to comply with these Oil Change and fuel filter
requirements for vehicles operating on biodiesel
blends up to B20 may result in premature en-
gine wear. Such wear is not covered by the New
Vehicle Limited Warranty. The engine may suffer
severe damage if operated with concentrations
of biodiesel higher than 20%.
47