Compatibility with Your Process. Can you even fire your process with fuel oil? Direct-firing with oil is taboo on some food applications, and many finishing operations gave up oil because of concerns about color contamination. Many products passing through today’s ovens didn’t even exist when oil was last in wide use -- there may be no history on how well they’ll tolerate its combustion products. This doesn’t mean you can’t use oil, but you may have to convert a direct-fired system to indirect firing.
Fuel Supply. Before committing to oil-burning equipment, be sure of an adequate supply infrastructure in your area. Much of it withered away when natural gas spread and achieved dominance. At the least, you need a local distributor able to supply the quantities you need on schedule.