check the catalytiac converter. Some exhaust shops will do it free..
The Aprilaire filter should be changed every 6 to 12 months for optimal performance.
Filter and fluid should be changed A.S.A.P. Y-THINK-Y
When it is dirty.
When it is dirty.
When the engine is getting a complete rebuild.
No. If your using regular oil it should be changed along with the filter every 3000 miles. If you are using synthetic oil it should be changed with the filter every 5000 miles.
Pre-filter for what? You posted this question in the Fuel Filter category. So I must assume you mean the pre-filter on the fuel pump. That is changed when the fuel pump is replaced.
You do not need to replace the timing chain because there is no timing belt at all on Ford Taurus. It has a timing chain.
Change the oil filter every time you change the oil.
An air purifier's filter should be changed every year, with the pre-filter cleaned or replaced every few months, depending on the conditions that the device operates in. Always follow the manufacturer's instructions.
The charcoal filter in a fish tank should be changed every 2-4 weeks to maintain water quality and keep the tank clean for the fish.
Each air conditioner take a different size of filter. The air filter should be checked routinely and changed as needed.