We are heating the oil to a supposed redwood of 6000pph as required by a Woodward burner control. I will check on the viscosity on the delivered oil.
The system is being used for animal feed drying, normally running on natural gas.
A need to look at your system would be required but you can get a "layering" of water temperature i.e. the mixing may not be as complete as you think. This all depends upon water inlet type of water i.e. purity of water, inlet and outlet does it go through a De-airator etc also as in previous...