Jeep 2013 Wrangler Owner's Manual page 331

† This maintenance is recommended by the
manufacturer to the owner, but is not required to
maintain emissions warranty.
WARNING!
You can be badly injured working on or
around a motor vehicle. Do only service work
for which you have the knowledge and the
right equipment. If you have any doubt about
your ability to perform a service job, take
your vehicle to a competent mechanic.
Severe Duty Conditions
†† Change the engine oil and engine oil filter at
every 4500 miles (7,500 km) or six months if
using your vehicle under any of the following
severe duty conditions:
• Stop and go driving.
• Driving in dusty conditions.
• Short trips of less than 10 miles (16 km).
• Trailer towing.
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• Taxi, police, or delivery service (commercial
service).
• Off-road or desert operation.
Maintenance Schedule – Diesel
Engine
At Each Stop for Fuel
• Check the engine oil level about five minutes
after a fully warmed engine is shut off.
Checking the oil level while the vehicle is on
level ground will improve the accuracy of the
oil level reading. Add oil only when the level
is at or below the ADD or MIN mark.
• Check the windshield washer solvent, add as
required.
Once a Month
• Check the tire pressure and look for unusual
wear or damage.
• Inspect the battery; clean and tighten the
terminals as required.
• Check the fluid levels of engine coolant/
antifreeze deaeration bottle, and brake mas-
ter cylinder, add as needed.
• Check all lights and all other electrical items
for correct operation.
At Each Oil Change
• Change the engine oil filter.
• Inspect the exhaust system.
• Inspect brake hoses.
• Check the engine coolant/antifreeze level,
hoses, and clamps.
• Inspect engine accessory drive belts. Re-
place as necessary.
• Inspect for the presence of water in the fuel
filter/water separator unit.
Inspection and service should be performed
anytime a malfunction is observed or sus-
pected. Retain all receipts.
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