A little update to the '11/'12 heating season. It took 865 gallons thur the season and to bring the tank back up to the starting level where it was last fall. Minus about 30 gallon of water drained from the tank. That puts me roughly 835 gallons used thur the season. If you use a conservative number of 144,000 BTU'S per gallon of waste oil that equal out to 120,240,000 BTU'S. If you use 92,000 BTU's for a gallon LP which is a little high we saved ourselfs roughfully 1,306 gallons of LP. It was a very mild winter. The waste oil boiler ran for a total of 1813 hours. That averages 2.17 gallons per hour of fuel. I was very pleased with the system.
Also learned that more is not always better. Reduced the volume from the metering pump and that reduced ash and soot build up in the boiler chamber. Too much make up air caused smoke from the chimney. Less compressed air pressure under 10psi made for a better burn.