heating veg oil idea .... advise please

[extreme-4x4]

ok i have fitted an automatic rad to my manual... its got oil cooler inside. so basicly cools the oil to the rad temp....

my plan is to divert fuel line into this spare oil heater. to thin the veg oil

obviously i have questions

1 how do i clean the old residue transmition fluid out of it ?
flush with petrol then flush with diesel . to clean it ?


2 is the coldest thermo stat 82 degrees ? if so will running veg oil at this temp have adverse effect on pump components/ rubbers etc. what is the point veg oil combustion? as i dont want a fire obviously

3 if this works id expect it will start to warm the oil after a couple of miles. ideas on heating oil for start up. could go for a glow thing . but where to place it , could i run it off standard glow relay

your thoughts???