measuring fuel efficiency

"Nial Stewart" wrote in message news: snipped-for-privacy@mid.individual.net...

That's a good point, if you're OK with just having an average over however many miles/fillups you drove in the interim.

I'm still pissed off. The other day I was fueling at my Giant Eagle Get Go, "supermarket" Got my 30 cents off per gallon. The darn thing shut off and started computing total, and I still had a gallon or two to go. I complained, but that did not work. I didn't hear or feel anything, like it usually does when the air tube hits gas.

greg

"supermarket"

total, and

Some of those auto-shut-off nozzles are downright flaky. And it depends a lot of how your car filler-tube "fits" the "standard". ...Jim Thompson

"supermarket"

total, and

Forgot to mention... One time in California, in the middle of nowhere (I5 way north of LA) I got gas, had to go inside to pay, signed the slip, was handed a form to fill-out, with name and address... station had been seized by FBI for fraudulent pumps... and I got a rebate check in the mail a few months later ;-) ...Jim Thompson

Well, that's not really the point of this exercise - of course there will be variations, that's why for the measurement you use the same station, the same pump, and push it down your filler the same distance both times. It's to establish a baseline for that particular vehicle, that you can use for reference in the scenario you've cited above.

Cheers! Rich

Does Arizona have those vapor recovery cuffs like in CA? The last time I went to Vegas was almost 20 years ago, and I noticed that their gas pump nozzles didn't have those cuffs. I wonder if NE or AZ has them nowadays?

Thanks, Rich

you're doing as Rich

your filling your

consistent are the

to use the same pump

at!

Also, if you have a filler tube like mine, it tends to cut off multiple times during a fill up, so you often don't get a 'full' fill up every time.

But like anything, it is the average that is important. if you do the calculation every time, then pretty soon you know what mileage to expect for the type of driving you do.

And, when you don't get that mileage, to start looking for what is wrong! (like an almost flat tire... ;-) )

Charlie

I normally get a good fill by waiting a couple seconds after the thing shuts off, and push again, and again. This lets the fuel settle down into the main tank.

I remember those Ca. or elswhere vapor stops on the ends of the filler spout. I never figured those out. I also cannot figure out why a couple tablespoons of gas goes on the walkway, every time after I remove the filler tube from my car.

greg

never figured

To clean up Californica air ?:-) ...Jim Thompson

Exactly, but what about that gasoline on the cement ??? Where is the suction device ??

greg

Actually I can't remember any "spills" of that sort in quite some time. ...Jim Thompson

it

flow:

Well, a few decades back, i just used inches vacuum for instantaneous MPG. Worked well enough to calibrate my driving patterns for better fuel economy (while still having some fun).

never figured

The only thing i can figure is that you don't wait. I never move the nozzle until after a few seconds after cutoff. Nary a drop spilled.

They have them in the few cities near the CA border, not much elsewise.

Actually, after many times all the noise averages out. Central limit theorem.

On Aug 18, 9:00=A0pm, "JosephKK" wrote: > On Thu, 12 Aug 2010 17:00:53 -0700, Rich Grise

Prius. 66708 miles. 1315.444 gallons. 50.71 MPG. No more noise after

G=B2