Dodge 2005 DH Ram Owner's Manual page 344

344 MAINTAINING YOUR VEHICLE
Never operate the engine with oil level below the "ADD"
mark or above the upper "SAFE" mark.
Change Engine Oil
CAUTION!
Overfilling or underfilling the crankcase will cause
oil aeration or loss of oil pressure. This could dam-
age 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 de-
fined as 190° F (66° C) coolant temperature).
• Extensive engine idling (over 10 minutes per hour of
operation) at ambient temperatures less than 32° F (0°
C).
• Driving in dusty conditions.
• Frequent trailer towing.
• Taxi, police, or delivery service (commercial service).
• Off-road or desert operation.
• Extensive operation at high engine speeds (greater
than 2900 rpm) and loads (greater than 70% throttle).
If ANY of these apply to you, then change your engine oil
at every interval shown in schedule B of the Mainte-
nance 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 Mainte-
nance Schedules section of this manual.