2004 Dodge Ram 3500 Pickup Owner Manual Diesel - Page 326

326 MAINTAINING YOUR VEHICLE Checking the vehicle while it's on level ground will also improve the accuracy of the oil level readings. Add oil only when the level on the dipstick is below the "ADD" mark. The total capacity from the low mark to the high mark is 2 quarts (1.9 liters). Change Engine Oil 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: • Frequent short trips where the engine does not achieve full operating temperature (operating temperature defined as 190° F (66° C ) coolant temperature). Never operate the engine with oil level below the "ADD" mark or above the upper "SAFE" mark. • Extensive engine idling (over 10 minutes per hour of operation) at ambient temperatures less than 32° F (0° C).