P38 tow weight.

When i went to Mancy airport to pick daughter up last month. Set trip computer to zero at top of Brockholes brow was showing 94.6 MPG at bottom soon diminished on way to Mancy land. 34.4 MPG for complete trip there and back. Mine is chipped and goes like stink if you want it to. Use the power use more fuel but on a steady run maybe a little better due to more linear map. There is only one way to increase power and torque on an otherwise unmodified diesel and that is to inject more fuel. Use the power use the fuel. Simples.