Regular engine oil changes keep your engine running smoothly and prevent costly damage down the road. But the old "every 3,000 miles" rule is outdated for most modern vehicles.
There is no single oil change interval for every engine. Follow the maintenance schedule and oil specification for your model, including severe service requirements and maximum time or distance limits. The correct interval depends on the vehicle and its use, not simply whether the oil is conventional or synthetic.
Unusual engine noise or a burning oil smell needs prompt inspection. An oil pressure warning is urgent, not a routine oil change reminder. If it comes on while the engine is running, stop as soon as it is safe and switch the engine off. Follow your owner's manual and arrange assistance. Do not continue driving merely to get an oil change, even if the oil level is correct.
If your vehicle has an oil life monitor, use it together with the manufacturer's maintenance schedule, required oil specification and maximum time or distance limits in the owner's manual. An oil life reminder is different from an oil pressure warning.