Friday, December 2, 2016

tank #30

Last tank lasted 270 miles before the gas light went on.  No check engine lights thrown.

gallons e85: 4.012 gallons @ $1.559/ gallon
gallons 87 octane gas: 8.896 gallons @ $1.859/ gallon

ethanol content of tank: 34.36%
octane of tank: 92.55

savings per tank compared to premium @ $2.359/ gallon: $7.66

Saturday, November 26, 2016

Tank # 29

No CEL on the last tank, and I went 260 miles before the gas light went on.


Gallons E85: 4.017 @ $1.739/ gallon
Gallons of 87 octane gas: 9.213 @ $2.039/ gallon


ethanol content of tank: 33.76%
octane of tank: 92.42


savings per tank compared to premium at $2.539/ gallon: $7.82

Tuesday, November 22, 2016

Tank # 28

No check engine lights and I got 280 miles on the last tank.  4 gallons of E85 is the sweet spot.  Car is running great.


gallons of E85: 4.006 @ $1.759/ gallon


gallons of 87 octane: 9.829 @ $2.159/ gallon


ethanol content of tank: 33.10%


octane of tank: 92.27


savings per tank compared to premium @ $2.659/ gallon: $8.52

Thursday, November 3, 2016

Tank #27

No CEL's on the last tank.  4 gallons of E85 per tank is the sweet spot.


Gallons E85: 4.026 @ $1.799/ gallon
Gallons of 87 octane gasoline: 9.360 @ $2.099/ gallon


ethanol content of tank: 34.30%
octane of tank: 92.538


savings per tank compared to premium @ $2.599: $7.90

Monday, October 24, 2016

The sweet spot

Putting 4 gallons of E85 in right when the gas light comes on results in about 35% ethanol, and almost 93 octane.  It's about a $7.50 per tank savings, and doesn't really lost much in the way of mileage.  This is the ethanol sweet spot.


If E30 were more widely available at blender pumps, it would be very compelling for cars that require premium fuel.  It would be a nice savings.

Tank #26

I got a CEL a little before halfway through the last tank, and it cleared in about 50 miles or so.  Stayed off for the rest of the tank.


I decreased the amount of ethanol in this tank as a result.  I think 4 gallons of E85 per tank is the sweet spot, the most that can be used without risking a check engine light.  I put a little more than that in this tank.


I got about 269 miles before the low gas light came on, about 11 miles less than the all gasoline tank.  That's a trivial loss in mileage.




gallons e85: 4.182 @ $1.559/ gallon


gallons 87 octane gasoline: 8.469 @ 1.859/ gallon


ethanol content of tank: 36.27%


octane of tank: 92.988


savings per tank compared to premium @ $2.559/ gallon: $7.58



Wednesday, October 19, 2016

Tank #25

So the gas light came on at 280 miles on my all gasoline tank, not really any different that my high ethanol tanks.  Weird.  I did take an on-ramp quite aggressively when it came on, so maybe it would have done more under normal circumstances.


Anyway, the topic at hand:


gallons e85: 4.511 @ $1.649/ gallon
gallons of 87 octane gasoline: 8.161 @ $1.949/ gallon


ethanol content of tank: 36.64%
Octane of tank: 93.095


savings per tank compared to 93 octane @ $2.459/gallon: $7.82


No CEL so far.