Posted by 4play on November 12, 2014 at 22:32:24 from (68.228.170.30):
In Reply to: Gasoline quality posted by Sprint 6 on November 12, 2014 at 05:46:54:
Several things can play into why we might be seeing higher failure rates. I wont go into to great big detail here but you can find articles, data and test results with a little research on negative effects of ethanol fuel, a few of them are listed below. Other possibilties could be from cheap made components, engines out of tune or other driveability problems.
1. Ethanol fuel that makes its way past the piston rings reacts with engine oil which extracts phosphorus from the oil and then it's drawn through the PCV system and engine. The phosphorus basically coats oxygen sensors and the catalyst causing failure. This scenario increases for engines that consume more oil. This problem also occurs more when using bio-ethanol which has been increasing in popularity.
2. Ethanol fuel molecules contain one extra oxygen atom, if this gets picked up by the oxygen sensor the fuel system will lean out causing even hotter combustion and exhaust temps. Ethanol already burns hotter than gas and more heat means reduced life.
3. Ethanol fuel is somewhat acidic, it also attracts water which is also acidic and corrosive. So with more ethanol you will get more water, acidity and corrosion.
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