S2214000003

Case Number: S2214000003
Release Date: September 2022
Symptom/Vehicle Issue: Guidelines For The Use Of Alternative Diesel Fuels.
Discussion: With the ever-increasing price of fuel, there has been a sharp increase in
the use of cheaper alternative diesel fuels. While many of the manufacturers of these
alternative fuels state that the fuel is compatible with all diesel engines, many have
NOT been approved for use in any FCA US LLC diesel applications including the 6.7L
Cummins® Turbo Diesel Engine.
The following is information from the owner’s manual regarding current fuel
requirements. Diesel fuel sources MUST meet these requirements to be approved for
use in FCA US LLC diesel equipped vehicles.
6.7L Cummins® Turbo Diesel, Fuel Requirements:
The Cummins® Turbo Diesel engine has been developed to take advantage of the high energy content and
generally lower cost Number 2 Ultra Low Sulfur Diesel Fuel or Number 2 Ultra Low Sulfur Climatized Diesel
Fuels. Experience has shown that it also operates on Number 1 Ultra Low Sulfur Diesel Fuels or other fuels
within specification.
Special Notes:
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A maximum blend of 20% biodiesel meeting ASTM specification D-7467 may be used with your
Cummins® diesel engine. (Models configured with B20 Capability.)
In addition, commercially available fuel additives are not necessary for the proper operation of your
Cummins® diesel engine. However, if seasonally adjusted fuel is not available and you are operating
below 20°F (-6°C), Mopar® Premium Diesel Fuel Treatment (or equivalent) may be beneficial to avoid
fuel gelling.
Number 1 Ultra Low Sulfur Diesel Fuel should only be used where extended arctic conditions (0°F or 18°C) exist.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online
does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear
to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the
appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechConnect, eCONTACT or Service Library
entry if no solution is found.
Stellantis US LLC
Version 4.5 07/22/2022
Fuel Requirements For All Other FCA US LLC Diesel Engine Applications:
These diesel engines have been developed to take advantage of the high energy content and generally lower
cost Number 2 Ultra Low Sulfur diesel fuel or Number 2 Ultra Low Sulfur Climatized diesel fuels.
Special Notes:
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A maximum blend of 5% biodiesel meeting ASTM specification D-975 may be used with your diesel engine
without any adjustments to regular service schedules. Please also see additional Biodiesel Fuel
Requirement notes below
Commercially available fuel additives are not necessary for the proper operation of your diesel engine.
Number 1 Ultra Low Sulfur diesel fuel should only be used where extended arctic conditions (-10°F or 23°C) exist.
Additional Biodiesel Fuel Requirement Notes and Cautions: (Applies to all FCA
US LLC Diesel Applications including the 6.7L):
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A maximum blend of 5% biodiesel meeting ASTM specification D975 is recommended for use with your
diesel engine. If frequent operation with Biodiesel blends that are between 6% and 20% (B6–B20) is
desired, the maintenance schedule is subject to shorter intervals.
The oil and filter change along with fuel filter replacement is subject to shorter intervals when operating
your engine on biodiesel greater than 5%. Do not use biodiesel greater than 20%.
For regular use of biodiesel blends between 6% and 20% (B6–B20) it is important that you understand and
comply with these requirements. For additional information, please consult the maintenance section of the
owner’s manual.
CAUTIONS:
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Failure to comply with Oil Change requirements for vehicles operating on biodiesel blends between 6% and
20% (B6–B20) will result in premature engine wear. Such wear is not covered by the New Vehicle Limited
Warranty.
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.
Use of blends greater than 20% is not approved. Use of blends greater than 20% can result in engine
damage. Such damage is not covered by the New Vehicle Limited Warranty.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online
does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear
to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the
appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechConnect, eCONTACT or Service Library
entry if no solution is found.
Stellantis US LLC
Version 4.5 07/22/2022
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In the event that the vehicle is filled with biodiesel and not used for more than a month, the fuel should
either be used up by driving (up to quarter tank) and filled with standard diesel blends with less than 5%
that is normally available. This will help prevent the fuel filter clogging and potential damage to the fuel
injection system due to degraded biodiesel, which is not covered by the New Vehicle Limited Warranty.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online
does not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear
to be similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the
appropriate course of action.
Contact STAR Center, or your Technical Assistance Center Via TechConnect, eCONTACT or Service Library
entry if no solution is found.
Stellantis US LLC
Version 4.5 07/22/2022