View Single Post
Old 04-04-2012, 04:08 PM   #27 (permalink)
Allch Chcar
EtOH
 
Allch Chcar's Avatar
 
Join Date: Jan 2008
Location: North Coast, California
Posts: 429

Cordelia - '15 Mazda Mazda3 i Sport
90 day: 37.83 mpg (US)
Thanks: 72
Thanked 35 Times in 26 Posts
Corrosion is like rust, it's a slow process, so the concern is longevity not sudden catastrophic failure.

There isn't any approval process for parts to be considered safe for E85 use. But there is a list of known compatible materials with Ethanol and Gasoline. Rubber, Mild steel, and certain plastics are not compatible with Ethanol. Parts with these components exposed to fuel without a protective coating will fail earlier. They have to use something compatible or a sacrificial coating that is safe. For example with aluminum they use a layer of zinc. To make Stainless steel they dip it in acid. There are some plastics that are safe though, like proprietary Viton.

Let me know if I missed something.

Quote:
Originally Posted by johnpr View Post
according to this article on wikipedia it is 105
Octane rating - Wikipedia, the free encyclopedia
Just so people don't get the wrong idea from this old thread. The AKI octane is about 95.6 for E50 and 95.8 for E85. It depends on what grade of Gasoline they use for blending too.

Investigation of Knock Limited Compression Ratio
of Ethanol Gasoline Blends
. Scroll down to Table 2.

Actual engine performance is closer to C16 from what I understand.
__________________
-Allch Chcar

  Reply With Quote