Forum Discussion
JaxDad
Dec 17, 2019Explorer III
SDcampowneroperator wrote:Cummins12V98 wrote:JaxDad wrote:Cummins12V98 wrote:
I am curious why some run premium when their small engines only require regular gas?
Simple. Most premium fuel is also ethanol free gasoline.
In bigger engines the benefits go far beyond not having gummed up carb’s, the net cost per mile is lower running premium gas than regular gas.
The increased fuel mileage exceeds the increased cost per gallon.
Someone smarter than me can please explain the above is simply not true.
Ethanol fuels absorb moisture from atmosphere as ethanol is a dessicant and the resulting water contamination can be a serious issue.
It loves water and can turn your gas into 10 % near beer.
That ‘near beer’ is exactly the issue. The Ethanol is aggressively hygroscopic
While it doesn’t seem like much, E10 gas can easily contain 0.5% water, but even that seemingly little bit means if you have an 80 gallon fuel tank it will contain 48 ounces of water.
That water not only contains zero energy value but will be distributed through the gas. No engine has sensors to detect and account for water, the result is the sensors picking up the excess oxygen released when water is sprayed into a cylinder that’s at 4,000++ degrees then adjust the timing based on false readings.
The real world end result is much lower fuel economy than what the greenies and politicians would have you believe.
The end result, in my case, proven over many thousands of miles, is that the cost per mile is slightly lower (about $0.03 / mile) burning ethanol-free premium fuel instead of E10.
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