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Pure Gas - Ethanol Free

Old 09-07-2015, 09:57 PM
  #1  
algregory
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Default Pure Gas - Ethanol Free

Anyone tried it? Any difference to write home about?

I have an '05 GT with a CAI Tuned for Regular Gas. I've been reading about "Pure Gas" there is an App you can get to tell you where the stations are. I almost bought some for my last fill up, but the station carried premium and I know running premium in a "regular" car doesn't really make any gains so it wasn't a valid test.

I've read that "Pure Gas" lasts a long time, doesn't make deposits, and more, wondering if there is any improvement in the running that is worth writing home about.

I do know that years ago my father drove out of his home state with ethanol into a state without ethanol, and he said his MPG wen up quite noticeably.

Wondering....
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Old 09-07-2015, 10:17 PM
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jwog666
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i use pure gas in my mustang and in my small engine stuff, no real performance gains, just like the idea that what i put it in can sit during the off seasons without the ethanol turning to crap and gumming up everything. if u ever have to pull apart a few carbs in the spring to clean them due to bad fuel, you will do the same. but on a daily driver that doesnt si for periods of time, u can run the normal E10 without concern
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Old 09-08-2015, 08:33 PM
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jz78817
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Originally Posted by algregory View Post

I've read that "Pure Gas" lasts a long time, doesn't make deposits, and more, wondering if there is any improvement in the running that is worth writing home about.
you've read a bunch of bull****. the two key problems with ethanol are 1) it is hygroscopic and absorbs water easily, and 2) is incompatible with some materials used in the fuel systems of older cars. it doesn't really make gas go bad any sooner, because "pure gas" goes bad once the lighter/more volatile petroleum fractions evaporate away.

I do know that years ago my father drove out of his home state with ethanol into a state without ethanol, and he said his MPG wen up quite noticeably.

Wondering....
this, on the other hand, is not bull****. Ethanol molecules contain oxygen, which means its optimum air:fuel ratio has to have more fuel for a given amount of air. The stoichiometric (optimal) air:fuel ratio for gasoline is 14.7:1. the stoich for ethanol is 9:1. so naturally, adding more ethanol to your gasoline means you need to run a rich fuel mix, which will reduce your fuel economy.

hey, at least we aren't running nitromethane, which has a stoichiometric air:fuel ratio of 1.7:1
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Old 09-09-2015, 10:27 AM
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movielover40
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I believe Mobil still uses pure gas.

Much better for older cars that use carburetors.
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Old 09-11-2015, 11:44 AM
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Nuke
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Little to no gain performance wise but up to about 4 mpg gain under certain operating situations. I'll fill the Stangs with non-ethanol if convenient. It's ALL I use in my boat and yard equipment due to fuel line deterioration.
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