Our oil tank used to serve a Rayburn which had the boiler for the heating etc, but during building works the Rayburn has been removed and we have a new (Grant) boiler in a new ground floor location, but slightly further away. This keeps cutting out and the engineer is now suggesting we move the oil tank 
which seems a bit of an over-reaction to me.
The tank is approx 20m away with a 1.5m - 1.8m rise to the boiler. They have fitted a Tiger Loop which they says is not doing the job (although it should be able to do a 3.6m raise over 30m). I think it is more likely to be air getting into the system somehow.
How far away is your tank? Do you need a Tiger Loop? Have you ever had any issues and how has it been resolved?
TIA (project is supposed to be completed in 6 working days so really a bit late for all this stuff and it's driving me nuts 