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Change Engine Oil
Refer to the Maintenance Schedule in Section 8.
NOTE: Under no circumstances should oil change
intervals exceed 6,000 mi (10 000 km) or six months,
whichever occurs first.
Engine Oil Selection
For best performance and maximum protection under all
types of operating conditions, the manufacturer only
recommends full synthetic engine oils that meet the
American Petroleum Institute (API) categories of SM or
SM/CF, and meet the requirements of DaimlerChrysler
Material Standard MS-10725.
The manufacturer recommends the use of a full synthetic
engine oil, such as Mobil 1 SAE 0W-40 or equivalent.
Engine Oil Viscosity (SAE Grade)
SAE 0W-40 engine oil is preferred for use in 6.1L Engines
within the operating temperatures shown in the engine
oil viscosity chart. SAE 5W-40 Engine Oil is also allowed
for use in 6.1L Engines. The proper SAE viscosity grade
of engine oil should be selected based on the following
recommendation and be within the operating tempera-
ture shown in the engine oil viscosity chart.
386 MAINTAINING YOUR VEHICLE