Jeep 2009 Grand Cherokee SRT - Owner Manual - Manual (Page 354)

Besides the maintenance items for which there are fixed
maintenance intervals, there are other items that should
operate satisfactorily without periodic maintenance.
However, if a malfunction of these items does occur, it
could adversely affect the engine or vehicle performance.
These items should be inspected if a malfunction is
observed or suspected.
Engine Oil
Checking Oil Level
To assure proper engine lubrication, the engine oil must
be maintained at the correct level. Check the oil level at
regular intervals, such as every fuel stop.
The best time to check the engine oil level is about
5 minutes after a fully warmed engine is shut off or
before starting the engine after it has sat overnight.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Maintain
the oil level in the “SAFE” range. Adding one quart of oil
when the reading is at the bottom of the “SAFE” range
will result in an oil level at the top of the “SAFE” range
on these engines.
NOTE: Fill engine oil one quart at a time.
CAUTION!
• Overfilling or underfilling will cause oil aeration
or loss of oil pressure. This could damage your
engine.
• Operating the engine with the oil levels below the
safe zone, or operating with oil levels that exceed
the top of the safe zone may cause engine damage.
Change Engine Oil
Refer to the “Maintenance Schedule” in Section 8 for
proper maintenance intervals.
352 MAINTAINING YOUR VEHICLE