The mileage or time period between engine oil changes. Modern intervals are typically 5,000-15,000 miles depending on oil and conditions.
Oil change interval is the mileage or time period between engine oil changes. Modern intervals have lengthened significantly compared to historical practice. Common modern recommendations are 5,000-7,500 miles for conventional oil, 7,500-10,000 miles for synthetic blends, and 10,000-15,000 miles for full synthetic oils with appropriate filters. Oil life monitor systems in many modern cars adjust intervals based on driving conditions.
Driving conditions significantly affect oil life. Severe service (short trips, stop-and-go traffic, towing, dusty conditions, extreme temperatures) accelerates oil degradation; intervals should be shortened for severe service operation. Highway cruising at moderate speeds is the most favorable condition; oil intervals can be extended for vehicles primarily used for highway driving. Track use accelerates oil degradation dramatically; track-focused vehicles often change oil every 1,000-3,000 miles or more frequently.
Modern synthetic oils (Mobil 1, Castrol Edge, Shell Pennzoil Platinum, Royal Purple, etc.) extend service intervals significantly compared to conventional oils. The specific oil specification (Dexos for GM, Mercedes 229.5 for AMG, BMW LL-04 for BMW) often requires specific oils designed for those applications. Mixing oils of different specifications can cause issues. The recommended oil and interval for your specific vehicle should be confirmed in the owner manual or with the dealer.