Every 2 Months Tuned Engine Air Filter X Check the air filter every other month. Replace it when it's dirty or as part of a tune-up.
Some cars have transparent reservoirs with level markings.
Battery Use extreme caution when handling a battery since it can produce explosive gases. Do not smoke, create a spark or light a match near a battery and always wear protective glasses and gloves. Have it checked with every oil change. Cables should be attached securely and be free of corrosion. If battery has filler holes, add only clear odorless drinking water.