Oh I don't know for sure, once every 25 years maybe.
How often should you change the fuel filter?
as often as needed
You should change your oil every 3,000 miles. If you drive your car rough, then you should change it more often.
Garage door springs and cables should be replaced every 7-10 years, or sooner if there are signs of wear or damage. Regular maintenance and inspections can help prevent unexpected failures.
everyday
How often should you change water pump in a boat
You should change them after every feeding because they should be washed after every feeding.
you should change it every week so it will always be clean.
every 3000 miles u should change them
The average motorist should change the oil every 3000 miles. Oil should be changed more often if driven in dusty condition.
Every week
You should change the oil every 3 months of 3000 miles.