Efficient use of wood

I'm feeding a Seton 100 with 500 gallons of storage. I don't have a way to weigh my wood so I hope someone can answer my question. Is it more efficient to build storage temps to max of 175-180 and let fire die until temp is around 140 or continue to feed small amounts and keep storage in the 150-160 range? We are experiencing colder season and I seem to be using more wood than last year. Any help would be appreciated.

stefan66 said:

I've found that only heating my tank as high as I need to make it through to
my next burn is more efficient. Less standby losses from tank.
Is your storage inside?

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Yes it is in the insulated boiler house. It's a 500 gallon propane tank with 12" of fiberglass insulation all around it so temp drop is minimal. Boiler house is about 75 ft from house and has about a 5 degree drop when there's a load. It's a pressurized system

stefan66 said:

Since your storage is in the outside boiler house and not in your home I'd recommend not heating the tank any more than you need. What insulation do you have on your underground lines? 5 deg. drop in temp seems a little much. Wet ground?
I've only been using my system for a little over 2 years so I'm still a newbee. how long u been running your system?

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Underground piping is 1" ThermoPex with the storage is approx 4' higher than house entrance and no trace of moisture anywhere. My gauges are not the best or in the best locations so that temp is questionable. This is the second season for me as well.