|
The engine isn't turning as often, however every time you reengage, it is starting with 0 oil pressure and has to build up again, so theres a second or two turning w/o oil which should cause a little wear, possibly more than steady state driving.
About being on only part time: if there is no penalty to steady driving (since there are no pumping losses) then accelerating should take more fuel than constant velocity (need power to change velocity, but to stay at a set speed only requires overcoming air resistance).
Outside of the engine losses, it should take a set amount of energy to go a certain distance at a certain speed, so if you have the engine off 50% of the time, presumably you should need to use twice the fuel when the engine is on, and they would cancel out (at best)
__________________
"I would usually take off on foot in the morning and being the gentleman I am---and to make a point about the inefficiency of car ownership---leave Dear Wife to dig out the [snowed in] car to drive to work (we worked in adjacent buildings). I would always arrive before her." http://forum.earlyretirementextreme....pic.php?id=881
|