2004 Dodge Ram 3500 Pickup Owner's Manual - Page 330

330 MAINTAINING YOUR VEHICLE Change Engine Oil • More than 50% of your driving is at sustained high speeds during hot weather, above 32°C (90°F) CAUTION! Overfilling or underfilling the crankcase will cause oil aeration or loss of oil pressure. This could damage your engine. Road conditions as well as your kind of driving affect the interval at which your oil should be changed. Check the following to determine if any apply to you: • Day or night temperatures are below 32°F (0°C). • Stop and go driving. • Extensive engine idling. • Driving in dusty conditions • Short trips of less than 10 miles (16.2 km) • Trailer towing • Heavy Loading • Taxi, Police or delivery service (commercial service) • Off-road or desert operation • 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" of the Maintenance Schedules section of this manual. If none of these apply to you, then change your engine oil at every interval shown on schedule A of the Maintenance Schedules section of this manual.