Dodge Viper Owner's Manual page 200

200 MAINTAINING YOUR VEHICLE
• More than 50% of your driving is at sustained high
speeds during hot weather, above 90°F (32°C)
• Trailer towing
• Taxi, Police, or delivery service (commercial service)
• Off-road or desert driving
• If equipped for and operating with E-85 (ethanol) fuel
NOTE: If ANY of these apply to you, then change your
engine oil every 3,000 miles (5 000 km) or 3 months,
whichever comes first, and follow schedule "B" in the
Maintenance Schedules in this manual.
If none of these applies to you, then change your engine
oil at every interval shown on schedule A in the
Maintenance Schedules in this manual.
NOTE: Under no circumstances should oil change in-
tervals exceed 6,000 miles (10 000 km) or 6 months,
whichever comes 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)
The proper SAE viscosity grade of engine oil should be
selected based on the following recommendation and be
within the operating temperature shown in the engine oil
viscosity chart.