With my EFI return into the Aux tank, I always know I have 6 gallons
available there. So, if I'm willing to wait more than about 250-300 miles
for a pit stop, I drive on the Main tank until the first stumble, select
Aux, and go to the nearest station. I very rarely put in more than 35
gallons of gas.
Ken H.
On Thu, Feb 18, 2021 at 1:50 PM James Hupy via Gmclist <
> Here in Oregon, we travel through the Columbia River Gorge frequently and
> encounter headwinds in the range of 45 to 70 mph occasionally. That wreaks
> havoc on fuel economy with a "streamlined barn door" like the GMC. So it
> pays to not press your luck on fuel range. I err on the side of common
> sense and caution on miles traveled between refueling stops.
> Jim Hupy
> Salem, Oregon
>
> On Thu, Feb 18, 2021, 10:02 AM Hanson Email via Gmclist <
>
> > I have used 300 to 350 miles for the last 40 years. Have driven several
> > times from Fremont to the John Wayne Airport in SoCal without fueling.
> >
> > JWID
> >
> > Dean Hanson
> >
> > 73 Painted Desert
> >
> > 75 Avion
> >
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