Fuel Requirements (Diesel Engines) - Jeep 2008 Grand Cherokee Owner's Manual

344 STARTING AND OPERATING
CAUTION!
• Replacing fuel system components with non-
ethanol compatible components can damage your
vehicle.
• Do not use ethanol mixture greater than 85% in
your vehicle. It will cause difficulty in cold start-
ing and may affect drivability.

FUEL REQUIREMENTS (DIESEL ENGINES)

Use good quality diesel fuel from a reputable supplier.
For most year-round service, No. 2 diesel fuel meeting
ASTM 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 No. 2 diesel fuel or dilute the No. 2 diesel
fuel with 50% No. 1 diesel fuel. This will provide better
protection from fuel gelling or wax-plugging of the fuel
filters.
This vehicle is fully compatible with biodiesel blends
up to 5% biodiesel meeting ASTM specification D-975.
NOTE: 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 maxi-
mum) to avoid damage to the emissions control system.