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Forum: General Talk
06-20-2014, 06:10 AM
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There are pros and cons on the reasons for any country to use ethanol mixes.
I mostly use E10 in an SRX and it gets 22mpg on freeway , no noticeable difference with 87 gasoline
Gasoline HHV = 47 MJ/kg, Ethanol HHV= 30 MJ/kg
So, E10 is (90% of 47) + (10% of 30) which is 45.3 MJ/kg or 96.3% of gasoline's specific energy. ( by weight)
But E10 with extra oxygen,has a higher effective octane rating (~94) then the standard gasoline in USA of 87
Some engine controls, (like the defunct Saab) could, I read, adjust the timing etc.
Back in the 1960's in Australia drivers will remember pre-ignition or "pinging in the summer when GM and Ford introduced the higher compression engines into Australia.
The boy racers liked to add ethanol, or better, methyl benzine to their "petrol"
At that time I was working after school in a service station and on Friday nights the boys came in and I would pour a in 2 gallon measure of methyl benzine and they would adjust their timing before going out the road for a few races.
That stuff is deadly, you would stagger if breathing a big enough whiff, no wonder wife says I am crazy these days.
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