Lowest /highest engine on neutral iGPH you've seen on each of your vehicles?
 

What's the lowest instantaneous GPH you've seen on any of your vehicles while your engine has been on and in neutral? Please no 0.0 responses; I think it would be interesting to see how much idle GPH can vary between and within our rides. Of course, the more info you can include about when you saw the numbers, the better, but even if you just give highs, lows, and your vehicle, that'll do. I'll start.

On my '95 Tercel, the highest I've seen it is around .78 or so right after starting the car on sub-freezing days where both IAT and engine coolant temps were showing 5F. The lowest I've seen so far is around .21 or so after driving around town during some of our slightly warmer days here with my radiator block installed. I bought the car in the late fall, so I'm not sure how low it can get. As spring arrives, I hope to see it drop below .2.

So short version:

Car: 1995 Toyota Tercel, AT.
High: .78
Low: .21

As you can see, that's quite a spread. 10mph at .78gph is 12.8mpg, while 10mph at .21 is 47.6 mpg. It really drives home how much of a role engine and air temps play in efficiency.

I think the lowest i've seen is .20GPH.

lowest i've seen on my Jeep (3.7L V6) is 0.34, highest was around 0.8 (but it wasn't fully warmed up at that point)

2003 Silverado. 4.8L V8
Low: .44
High: ~2.75

It fluctuates a lot when I first start it up, but when it's cold, it uses a lot of fuel, even just idling. But it comes down pretty quick, it's under 1.0 within 10 seconds, and then gradually approachs the low as it warms up.

AC bumps it from .44 to .50.

Mike

I only have a SG on my VW.

It reads 0.10 when warmed up, cold it can go as high as 0.22.

7200lbs of hypermiling heaven
 

On my '05 Ford Excursion 6.8L V-10 my Ultra-Guage reads 2.85 at 15 degrees F and the lowest I've seen it is .83:eek: Obviously not the ideal commuter car but it does get used some depending on weather (bad) and my work schedule vs her schedule. We try to share the Honda CR-V (1.6 cold and .31 warmed up) for our winter commutes and save the big Ex for towing the race trailer and camper.

Lowest .08
Highest.21

I make no claims to the accuracy of my scanguage.

2006 Scion xB, 1.5 liter engine
0.67 gph at cold start (40 degrees F)
0.11 gph at idle when fully warmed up
0.14-0.15 gph is more typical for warm idle. I see those numbers 4 times out of 5, with the 0.11 gph seen 1/5 times

My 2002 Nissan Sentra SE-R Spec V with 2.5 liter engine
0.22 gph at warm idle

More info here:
How's your idle?

1.5 upon starting from cold (open loop) quickly settles to less than 1.0
.15 when fully warmed.