Oil v. propane
When remodeling our L.I. (NH) home we looked into oil or propane. When we sold that home and built on the Neck road we went the same route.
Pricing (acquisition and ongoing costs) and technology were paramount.
With some advice from my son who has a degree in HVAC and has worked in that field ( industrial, not homes) suggested propane for many reasons, especially ongoing maintenance.
Our heating and plumbing contractor suggested we look into Our Town Energy Alliance (OTEA) for supplying of the propane. We did, and got an account with Eastern propane. We have been happy with the service. We are also on auto delivery, and have never been disappointed. Yes, getting down to 20-25% before delivery is not uncommon.
Pricing is adjusted yearly with broker rates.
https://www.otchoice.com/
https://www.otchoice.com/content/about-2
https://www.otchoice.com/energy-and-fuels