SNS3Guppy
If you slow the MCR down by so it is going at the same speed as your 172 it will burn 14lph of MOGAS, so the fuel cost will be less than ½ the 172 – just as Jan Olieslagers said. If you then take maintenance into account, the MCR is likely to cost you around £5k per year less than your 172. In the UK people are abandoning the 172 / PA28’s due to the high cost of ownership, which is why the price has collapsed.
Rod1