what additives can i add to home heating oil to clear unwanted deposits?
Pro is correct. You can but additives all day long and still have deposits in your system. Most systems should have a water separator/filter and an additional final filter. Keep them changed regularly.
mario make a call to your oil provider, most of them have specific brands and additives that are ok and those that arent ok. so all in all call your oil company.
What kind of deposits? Fuel oil is diesel fuel, any type of diesel additive will work. Read the bottle, find one you like. Bio-diesel will also clean stuff.