Quote:
Originally Posted by HighMPG
feathering the throttle is not a rookie mistake but part of saving gas.
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When you need power - as when accelerating - it's good to make that power as efficiently as the engine will let you.
Strangely enough, you don't get that by feathering the throttle, but by accelerating at the best Brake Specific Fuel Consumption - BSFC - where most horses are fed using the least fuel.
This usually means giving it a good go, say 80% load, at low rpm.
It's how pulse and glide becomes more efficient than steady state driving.
If you can find a BSFC chart for the engine, you can see where it makes its power most efficiently.
For (more or less) steady state driving, feathering the throttle is OK.