Quote:
Originally Posted by kc7ekk
"Coasting in gear", refers to letting off the gas but leaving the clutch in the gear it was in. Preferably a high gear so the RPM of the dead weight of the engine doesn't slow you down too much.
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The MPG while doing so will be better than with the gearbox in neutral, as the fuel flow is cut off (DFCO).
But the downside is you won't get nearly as far.
Coasting in neutral and with the engine on is what lowered my fuel use considerably over DFCO.
I still underestimate just how far it'll roll
My car is a diesel, does DFCO right down to 1000 rpm, and the engine braking is considerable.
I've always made good use of the DFCO feature - well, before joining ecomodder that was - but it never consistently returned the kind of MPG I'm seeing now.
If you use MPG for recording, it'll bias towards DFCO, as you get towards infinite MPG (division by 0).
This can upset the readings you've taken.