Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Gas burned per minute spent idling figures?

user removed · 05-29-2013, 11:23 PM

If you have instant MPG reading capability, then coast in neutral with engine idling until your reading drops below max gauge capability.

In my 2002 Insight the speed was 16 MPH when the instant MPG gauge dropped below the max reading of 150 MPG. I divided 16 by 150 to come out with idle consumption of .11 GPH.

.5 GPH for most V8s
.33 GPH for most V6s
.25 GPH for most 4 cyls.

These are average numbers but can vary considerable depending on engine displacement and idle speed. Adding loads like AC can increase it substantially.

I used to tell people that my Insight would go 40 MPH on the same fuel a V8 used to just idle itself (.5 GPH and 80 MPG at a steady 40 MPH (CVT not manual)).

regards
Mech

05-29-2013, 11:23 PM	#2 (permalink)
user removed Master EcoModder Join Date: Sep 2009 Posts: 5,927 Thanks: 877 Thanked 2,024 Times in 1,304 Posts	If you have instant MPG reading capability, then coast in neutral with engine idling until your reading drops below max gauge capability. In my 2002 Insight the speed was 16 MPH when the instant MPG gauge dropped below the max reading of 150 MPG. I divided 16 by 150 to come out with idle consumption of .11 GPH. .5 GPH for most V8s .33 GPH for most V6s .25 GPH for most 4 cyls. These are average numbers but can vary considerable depending on engine displacement and idle speed. Adding loads like AC can increase it substantially. I used to tell people that my Insight would go 40 MPH on the same fuel a V8 used to just idle itself (.5 GPH and 80 MPG at a steady 40 MPH (CVT not manual)). regards Mech Last edited by user removed; 05-29-2013 at 11:59 PM..