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Old 05-13-2008, 02:32 PM   #1
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mileage took a dive

I thought I was doing so much better as my ScanGauge read 37mpg for this last tank and also showed that I used 12 gallons. I went to the station and pumped really slowly as I had read about here. To my surprise, it took 13.28 gallons to refill my take and knocked my mileage below 34mpg. Something is wrong; time will tell. I've used 1/4 tank since then only getting 33mpg.
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Old 05-13-2008, 02:45 PM   #2
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um... oh no? just gonna complain or got some ideas about why?
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Old 05-13-2008, 03:31 PM   #3
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If you pumped slower than usual, you pumped fuller than usual. Slower pumping is like topping off.
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Old 05-13-2008, 04:19 PM   #4
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Quote:
Originally Posted by theholycow View Post
If you pumped slower than usual, you pumped fuller than usual. Slower pumping is like topping off.
This is what I hope happened. I've never gotten over 13 gallons into the tank on a refill before.I looked up the tank size and it's 14.1 gallons; all those times I worried about running out for nothing. The only different thing I did this tank was more pulse and glide,which I thought helped. I just got 38mpg coming back from the grocery store( per ScanGauge). We have had some wind and rain lately and I did have to go into some shopping mall parking. That could account for the bad mileage on this tank so far.
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Old 05-23-2008, 11:43 AM   #5
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Looks like it was the slow pumping top off that threw the mileage off. I topped it off again at about the same miles and got 35.8mpg; about what I had been getting recently. The ScanGauge was off again, but in the opposite direction; showing 32.9mpg. I'll have to keep on topping off to keep my gas log correct.
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Old 05-23-2008, 11:56 AM   #6
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Sometimes I think the Chevron station I fill up at changed their calibration and charge me more for less gas!
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Old 05-23-2008, 12:01 PM   #7
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Quote:
Originally Posted by JESSE69 View Post
Sometimes I think the Chevron station I fill up at changed their calibration and charge me more for less gas!
I usually run my tank pretty low,so if it ever goes over 14.1gallons. I'm calling the Dept of Agriculture division of weights and measures.
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Old 05-23-2008, 12:25 PM   #8
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I filled a 5 gallon gas can for the mower at the local country station a few years ago and they tried to charge me for 8 gallons. The pumps were WAY off.
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Old 05-23-2008, 11:32 PM   #9
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Since i started a log on this web site and read others logs it seems the mpg will go up and down some what until we post many tanks to get a good average.
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Old 05-24-2008, 12:03 AM   #10
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Quote:
Originally Posted by JESSE69 View Post
Sometimes I think the Chevron station I fill up at changed their calibration and charge me more for less gas!
I had this suspicion once of a Cumberland gas station (I believe it's Gulf gas) I was so sure of it in fact, that I got a gas can and filled it up to the 5 gallon mark and logged how many gallons it took (about 5 gallons) and then emptied the gas into my car and did the same thing at the station across the street, filling the gas can up to 5 gallons again which was also a very similar number. So, to my disappointment, I had to drop that hypothesis.
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