What speed to drive normally on a 60MPH road

[al_roverMG]

Then Jem please accept what the majority (who are correct rather than your instructor and the police you have spoken to who are wrong) say that you should, unless there is something that makes it unsafe, travel at or very near to the speed limit.

As i said the rule of thumb is 10%. so on a national speed limit single carriage way you should be traveling at around 55 MINIMUM and not more than 66 MAXIMUM. you will actually find that the at 56mph in the ZSTD you will actually get 2mpg more than if you sit at 50. this is because your sat almost on the peak torque figure and so the engine is at the optimum revs for economy so i am afraid your "i do it for economy" argument is a little flawed.

The biggest fuel save of all though is observation. if you drive at a steady speed making proper use of the lanes on a multi lane carriage way (ie in the left lane unless overtaking) pulling out in reasonable time to overtake and judge it correctly you will get much better economy than those who come up behind someone to overtake and then check the mirrors. As an HGV driver u spend 1/2 your time looking in the mirrors and checking your blind spots, 4/10 looking forward and 1/10 checking your speed. If most car drivers did this then half hold ups we have today because someone has had to panic brake for a dozy driver which then brings the lane to a stop further back.