Amoco Heating/Smith Oil & Propane Inc provides propane, diesel, gas and oil products to the Saint Johns, MI area. COVID-19 update: Our office is now open! In response to the COVID-19 pandemic, Amoco Heating/Smith Oil & Propane is taking steps to ensure the safety of our customers and employees. We are still dedicated to serving you and will continue to make deliveries of propane and fuels to our local customers and business owners. For your convenience, we now offer online bill payments on our website. Simply select the "Pay Bills Here" button at the top left of the web page and follow the steps to complete your payment. Payments can also be made, as usual, by mailing a check, dropping a check or cash into the dropbox outside our office, or calling our office at (989) 224-3474 with a credit card.