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Old 06-26-2016, 06:35 AM   #1
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Question Chevron Conspiracy?

I seem to have trouble finding discussion of gas mileage
for the same vehicle from one major brand to the other.
I drive a 2012 Prius and regularly compare the mileage I get with the same type of driving from one brand to the other. I consistently find that among Shell, Chevron and 76, I get the poorest mileage with Chevron. Chevron is worst by as much as 3 to 4 mpg.
My cynical side says this is a way for Chevron to extract more purchases from their loyal Techron affectionadoes who never try another brand.
Any thoughts?
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Old 06-26-2016, 07:07 AM   #2
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They may be just tossing in some extra ethanol.
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Old 06-26-2016, 11:59 AM   #3
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I've noticed this with Marathon. Just saw it with a couple of tanks, going back and forth from different brands. Saw it especially with diesel fuel. Didn't keep studying to try to prove it was fact. Just quit going. Never use Chevron so don't know
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Old 06-26-2016, 10:48 PM   #4
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In the UK I used to get slightly worse mileage with one particular supermarkets own brand of diesel.
I later read the small print on the pump, it was mixed with minimum 7% biodiesel...
Biodiesel may be great if priced lower, but running pure biodiesel in a '92 1.7 Astra I used to get about 42 mpg (imp) but around 54 mpg (imp) running on regular diesel.
I would expect any diesel pump mixed with biodiesel to give fewer miles per gallon, presumably its the same with petrol missed with ethanol.
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Old 06-27-2016, 06:23 AM   #5
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Is this observation from a single station?
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Old 08-09-2016, 08:49 AM   #6
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I usually fill up with Chevron 94 (non ethanol) and get best performance and mileage.
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Old 08-09-2016, 10:53 AM   #7
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If you get better MPG with gas/diesel that costs more are you saving any $ ?
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Old 08-09-2016, 11:49 AM   #8
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Quote:
Originally Posted by DesertRat2011 View Post
If you get better MPG with gas/diesel that costs more are you saving any $ ?
For that, simply work out cost per mile (fuelly does that anyway) then multiply it by however many miles you intend to use that fuel for. Of course, you could argue that better fuel will be better for your engine, less maintenance and less oil changes, so it could help in more ways than you think.
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Old 08-09-2016, 01:43 PM   #9
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Originally Posted by DesertRat2011 View Post
If you get better MPG with gas/diesel that costs more are you saving any $ ?

More in interested in the performance of the fuel, I don't want any pre ignition and Chevron has the best cleaner for fuel systems. I understand that all manufacturers in the US ship Chevron fuel to their plants when doing EPA mileage tests.
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Old 08-10-2016, 04:46 AM   #10
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The EPA tests use a special test blend that you won't find at the local gas station.
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