Surgery - Colorectal. In brief: Yes, most docs can. Most hemorrhoids should first be treated by conservative measures, such as bulking the stools, education to avoid bad habits like straining, sitting for long periods of time, etc.
Either system will have a burner. 23 years may very well be beyond the typical life expectancy of a oil burner, but a furnace or boiler should last considerably longer than 23 years. The boiler of my house here in MA is 58 years old and still works fine. I am starting to consider replacements, however.
How long does oil last? The shelf life of oil depends on the best before date and how it is stored. Many people ask does oil go bad? Although they do tend to last longer than their best before dates, the answer to does oil go bad is most definitely yes! Oils are extracted from various plants - either from fruits as in olive, vegetables as in corn, seeds as in sunflower, or nuts as in peanut. So, how long does oil last? When properly stored, the shelf life of oil past its best before date is ... But remember that oil, like a lot of other condiments, usually has a best before date and not a use by date or an expiration date.