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Originally Posted by AndrejCF
I cant turn the engine off while coasting down hill becaouse its too dangerous
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I don't turn the engine off either when coasting, as I want to keep the powersteering and assisted brakes for safety.
But coasting still gives better results than using engine braking (or DFCO - decellerating Fuel Cut Off as it'soften called here).
Try coasting on the safe, slight downhills, and you'll get further up the next hill
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With downhill and in gear engine is running without gas/diesel, when you slow down to the minimum rpm, about 800, then engine is powered with gas/diesel.
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That's the situation you have to avoid when using engine braking.
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With this mode i do not spend any diesel, its more secure and just little slower
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When the hill is steep enough, you have to use engine braking for safety - and it doesn't even cost any fuel.
But when the hills are not so steep, it's more efficient to coast, even with the engine on.
Even on a flat road, it's more efficient to coast from further away than to use engine braking as I've found out.
There are plenty of tips for efficient driving in the hills - like not using cruise control.