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15% Ethanol and 991s?

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Old 10-12-2018, 12:50 PM
  #31  
Bob Z.
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Originally Posted by Got_Corners?


this is very helpful, thanks! Quick follow up question though....is 94 octane harmful to our motors (991.1 C2S) also if not specifically tuned/timed for it? I ask cause there is a station near me with it and I'll happily switch to avoid 10% or 15% Ethanol.
I would love to have 94 near me...no harm at all.
Old 10-12-2018, 08:50 PM
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DBH
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The Porsche owners manual for 2018 991.2 says it's okay with 15% ethanol.
Old 10-12-2018, 08:53 PM
  #33  
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Originally Posted by spdracerut
The issue isn't the ability of the fuel system to adjust the fuel trims. The issue is the materials used for all the components in the fuel system. Ethanol degrades materials used in fuel systems designed for plain unleaded gas. 10% is about the limit typical materials used can handle without significant degradation. But 15% is too much for sure for older cars. A car designed to run flex fuel and E85 will not have issues, but every other car will.
Have you converted a 12 year old gas car to E85 then daily drove it for 2 years? I have...no ill effects (other than big power and horrible fuel mileage). The only parts I changed were due to my power goals (injectors and pump).

Fuel systems have been designed to put up with ethanol for quite a while now. The same lines...on flex fuel and regular vehicles...on the shelf at your chain auto parts store....all of em designed to deal with ethanol.

Now cars older than 2006...agreed...no guarantees. 1990's are questionable but there are plenty of people converting older Japanese turbo cars to ethanol on stock lines. 1980's and older...yeah...wouldn't try it without a complete fuel system refit.
Old 10-12-2018, 10:06 PM
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WhipE350
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Man...does this mean the price of Corn Flakes will go up again .

Have we found a subject that both conservatives and liberals can agree on here? Time to celebrate!
Old 10-12-2018, 11:03 PM
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https://www.pure-gas.org/maps
Old 10-12-2018, 11:08 PM
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flsupraguy
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I'll gladly take more ethanol.... when cobb releases the tune! Hell, one of my jet skiis is tuned for e85.
Old 10-13-2018, 12:51 AM
  #37  
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How about we leave the ethanol for beverages?
Old 10-13-2018, 04:34 PM
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Originally Posted by bkrantz
How about we leave the ethanol for beverages?
Anyone for Wild Turkey? Or, Bacardi 150? Bacardi 150 makes for a wicked Mai Tai...

On a more serious note, if you have access to the unadulterated unleaded race gas, you can blend some of that into the E15 to get to E10. The more E0 race gas into the E15 swill, gets you to a lower E rating and a higher octane rating....



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