Depending on the year and mileage, probably one or the other. Or ask the place that changed your oil. Or, look in your owners manual for recommended maintenance intervals. You can also check the fluid levels yourself to see if they need to be refilled. Who did the oil change? A lot of times, shops will try and upsell to make money off people. If you’re high mileage, wouldn’t hurt to do a cooling system flush and refill and do a transmission fluid and filter change.