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Old 11-19-2012, 03:52 PM   #81 (permalink)
Vekke
Mechanical engineer
 
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Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 987

Siitin - '98 Seat Cordoba Vario
90 day: 58.56 mpg (US)

VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L
Diesel
90 day: 104.94 mpg (US)

A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual
90 day: 64.64 mpg (US)

Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L
90 day: 54.57 mpg (US)

Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual
90 day: 32.98 mpg (US)

A2 1.4TDI - '03 Audi A2 1.4 TDI
90 day: 45.68 mpg (US)
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For those who are already at the extreme fuel consumption figures with your cars:
You can calculate the speed when its more fuel efficient to start using engine braking vs coast in neutral.
Get your idle fuel consumption
Use your average fuel consumption or your fuel consumption target for that tank.
calculate the speed when you will burn more fuel when coasting in neutral than your target fuel consumption

Now the engine braking under that speed limit which you get is more fuel economical if:
- you need to stop for sure
- you shut down the engine when you stop

If you use EOC this is not valid for you.

Like people have said there is no one answer and there are always many factors which is best way. General rules still follows:
-EOC is the best option
-Neutral coasting second best in most cases
-engine braking, when need to slow down more than coasting in neutral does slow you down.

So try to save the momentum as much as possible like said before.

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