[euromodder]

When you get your best MPG during constant load driving, the engine isn't working at its best BSFC.
That's the key to P&G.
The engine is only returning good MPG because it's hardly putting out any power.
It could make more power more efficiently, if only you'd let it.
But in normal driving, you can't let it as you'd always be accelerating because the engine would put out more power than what little you'd need.

Enter P&G.
The pulse is done near the best BSFC.
MPG are fairly high, but there's also a lot of power being generated very efficiently, for a short period of time.
Gliding engine-off consumes no power at all.
(Keeping the engine on uses only a little bit of gas - though in a highly inefficient way)
The catch is to stretch the glides to the maximum, i.e. reduce drag as much as possible.


The combination of bursts of highly efficient fuel use with no fuel use at all, is often better than driving with constant load at an inefficient power setting.