Engine Oil - Jeep 2010 Wrangler Owner's Manual

JOBNAME: CHRY OM INTL (Conten PAGE: 248 SESS: 2 OUTPUT: Wed Aug 25 08:13:16 2010 SUM: 450FC173
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CAUTION!
• Failure to properly maintain your vehicle or
perform repairs and service when neces-
sary could result in more costly repairs,
damage to other components or negatively
impact vehicle performance. Immediately
have potential malfunctions examined by
an authorized dealership or qualified repair
center.
Your vehicle has been built with improved
•
fluids that protect the performance and
durability of your vehicle and also allow
extended maintenance intervals. Do not
use chemical flushes in these components
as the chemicals can damage your engine,
transmission, power steering or air condi-
tioning. Such damage is not covered by the
New Vehicle Limited Warranty. If a flush is
needed because of component malfunc-
tion, use only the specified fluid for the
flushing procedure.
246

Engine Oil

Checking Oil Level
To assure proper lubrication of your vehicle's
engine, the engine oil must be maintained at
the correct level. The engine oil level should be
checked five minutes after a warmed up engine
has been shut off.
Checking the oil while the vehicle is on level
ground will improve the accuracy of the oil level
readings. Always maintain the oil level within
the SAFE zone on the dipstick. Adding one
quart of oil when the reading is at the bottom of
the SAFE zone will result in a reading at the top
of the safe zone on these engines.
CAUTION!
Overfilling or underfilling the crankcase will
cause aeration or loss of oil pressure. This
could damage your engine.
Change Engine Oil
Refer to the "Maintenance Schedule" for the
proper maintenance intervals.
NOTE:
Under no circumstances should oil change
intervals exceed 7,500 miles (12 000 km) or
six months whichever comes first.
Engine Oil Selection – Non ACEA
Categories
For best performance and maximum protection
under all types of operating conditions, the
manufacturer only recommends engine oils
that are API certified and meet the require-
ments of Chrysler Material Standard MS-6395.
art=072603092.tif NO TRANS
This
means that the oil
has been certified
by the American
Petroleum Institute
(API). The manu-
facturer only rec-
ommends
Certified
oils.
symbol
API
engine