I filled up at Meijer last night.
I got 4.008 gallons of E85 at $1.80 a gallon.
I got 10.512 gallons of 87 at $1.90 a gallon.
My new tank is 26.37% ethanol and 91.57 octane.
The last tank finished at 21.5 mpg at 25 mph average speed. The awful weather is reflected in that awful mileage!
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Experiments in running E85 ethanol, mixed with regular 87 octane gasoline, in non-flex fuel vehicles (2004 Acura TL and 2007 Saab 9-3.)
4 comments:
Hey Buzz...just curious, how do you get such exact measurements of your octane levels?
Yeah, it's a false precision. Just doing the math, that's all.
87 Octane is... 87 octane. E70 is 100 octane. E83 is 105 octane. I just interpolate for the intermediate grades.
Since I don't know exactly what the ethanol content of the E85 that I buy is, this is not all that accurate. If anything, I'm probably a little low.
Same goes for the etahnol content, BTW. I just calculate it, and it is a little inaccurate.
What I really need to do is get an ethanol sensor from an old Ford Taurus and hack a microcontroller to read it. Then I'd know exactly what I'm running.
Sadly, when they come up on eBay, those sensors are really expensive.
Oh ok cool! I was just wondering because I've just been guessing on mine.
I've got a spreadsheet that I use to keep track of everything, so that I don't need to do the math every time I fill up.
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