In reply to a message from Skyman sent Sat 7 Jan 2012:
How technical do you want?
90 octane is below what your car should have but it will
adapt to the 90 octane because the computer ‘‘learns’’
Minnesota has had that same gas for a long time…
Technically it’s not supposed to be used for road driven
vehicles… Lawn mowers boats snow-mobles, Jet ski’s etc.
Ethanol has 114 octane… if you mix REC-90 50-50 with
ethanol you wind up with 102 octane…
However the unleaded premium (93 octane) starts out with a
base stock of about 85 octane gasoline and added 114 octane
ethanol to it yields out 93 octane…
Since you asked ethanol is a good thing for the following
Note: none political
Higher octane.+greater power potential
Extends the number of gallons the refinery can get from a
barrel of oil.+ lower cost per gallon of gas.
Every refinery is different but guessing SWAG 10%
ethanol/gasoline saves you about 40 cents a gallon after
adding in the cost of ethanol…
The engine will run cooler with ethanol
The engine will run with less deposits because of ethanol.
Tune ups will last longer
Injectors will stay cleaner.
Now the Bad stuff…
Gas mileage is slightly worse… Assuming say 20MPG Pure
gasoline would get about 21 MPG to ethanol/gasoline
combination getting 20
(adjusting for say 10 MPG pure gas would get 10.5 MPG and
ethanol/gas blend get about 19 MPG)–
The original message included these comments:
Average MPG 17.5. Once down there I found some gas stations that
sell non ethanol 90 octain gas called REC-90.Just wondered if
anyone else has used this gas.
Wayzata Minnesota, United States
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