It is important for you or a service station attendant to perform these underhood checks at each fuel fill.
Check the engine oil level and add the proper oil if necessary. See Engine Oil for further details.
Check the engine coolant level and add the proper coolant mixture if necessary. See Engine Coolant for further details.
Check the windshield washer fluid level in the windshield washer fluid reservoir and add the proper fluid if necessary. See Windshield Washer Fluid for further details.