Oil changes: use the interval in your manual
How often and which oil come from your owner's manual, not a sticker or a rule of thumb.
The interval
Your owner's manual lists how often to change the oil for your engine, and may list a different interval for harder driving. We do not publish a single interval.
The oil grade
FuelEconomy.gov says you can improve your gas mileage by using the manufacturer's recommended grade of motor oil. Your manual names the grade, such as a viscosity like 5W-30.
The label to look for
FuelEconomy.gov says to look for motor oil that says "Energy Conserving" on the API performance symbol.
Checking the level
NHTSA says to check your vehicle's oil level periodically, and that if it is almost time for your oil change, to do it before you travel.
Oil life monitors
Some cars show an oil life reading on the dashboard. Read how your manual says to use it alongside the schedule.
Reading the shop sticker
A windshield sticker from a shop may show its suggested next date or mileage. Check it against the interval in your manual.
This is general information, not mechanical or legal advice. Your owner's manual and a qualified technician come first.
Sources: FuelEconomy.gov (U.S. Department of Energy and EPA), Keeping Your Vehicle in Shape; NHTSA, Summer Driving Tips.
FAQ
Next: maintenance schedule
Your manual sets the schedule.
