1997 Ford Aerostar Owner's Manual - Page 233

NOTE: Ford production and aftermarket (Motorcraft) oil filters are designed for added engine protection and long life. If a replacement oil filter is used that does not meet Ford material and design specifications, startup engine noises or knock may be experienced. It is recommended you use the appropriate Motorcraft oil filter (or another brand meeting Ford specifications) for your engine application. Checking and Adding Engine Oil Since the proper amount of engine oil is important for safe engine operation, check the oil using the dipstick each time you put fuel in your vehicle. Remember the engine must be off, the oil must be warm and the vehicle must be parked on level ground. Checking the engine oil level: 1. Turn the engine off after it has warmed up and allow a few minutes for the engine oil to drain back into the oil pan. Set the parking brake, making sure the gearshift is securely latched in P (Park). Open the hood. Protect yourself from engine heat. Locate the engine oil dipstick (highlighted in yellow) and carefully pull it out of the engine. Wipe the dipstick clean and put it back into position, making sure it is fully seated. 2. 3. 4. 5. 234