Fuel Requirements - Diesel Engine; Diesel Fuel Specifications; Biodiesel Fuel Requirements - Jeep GLADIATOR 2023 Owner's Manual

394 TECHNICAL SPECIFICATIONS
FUEL REQUIREMENTS – DIESEL ENGINE
Federal law requires that you must fuel this vehicle with
Ultra Low Sulfur Highway Diesel fuel (15 ppm Sulfur
maximum) and prohibits the use of Low Sulfur Highway
Diesel fuel (500 ppm Sulfur maximum) to avoid damage to
the emissions control system.
Use good quality diesel fuel from a reputable supplier in
your vehicle. For most year-round service, Number 2
diesel fuel meeting ASTM (formerly known as the
American Society for Testing and Materials) specification
D-975 Grade S15 will provide good performance. If the
vehicle is exposed to extreme cold (below 20°F or -7°C),
or is required to operate at colder-than-normal conditions
for prolonged periods, use climatized Number 2 diesel fuel
or dilute the Number 2 diesel fuel with 50% Number 1
diesel fuel. This will provide better protection from fuel
gelling or wax-plugging of the fuel filters.
WARNING!
Do not use alcohol or gasoline as a fuel blending agent.
They can be unstable under certain conditions and
hazardous or explosive when mixed with diesel fuel.
Diesel fuel is seldom completely free of water. To prevent
fuel system trouble, drain the accumulated water from the
fuel/water separator using the fuel/water separator drain
provided on the fuel filter housing. If you buy good quality
fuel and follow the listed cold weather recommendations,
fuel conditioners should not be required in your vehicle.
If available in your area, a high cetane "premium" diesel
fuel may offer improved cold-starting and warm-up
performance.
CAUTION!
If the Water in Fuel Indicator Light remains on, DO NOT
START engine before you drain the water from the fuel
filter(s) to avoid engine damage page 345.
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D F S
IESEL UEL PECIFICATIONS
This 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.
NOTE:
 If you accidentally fill the fuel tank with gasoline or DEF
on your diesel vehicle, do not start the engine. Damage
to the engine and fuel system could occur. Please call
an authorized dealer for service.
 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.
 Commercially available fuel additives are not neces-
sary 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.
B F R
IODIESEL UEL EQUIREMENTS
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 page 336.
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CAUTION!
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.