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 > My perception on real gas

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philh

Belleville MI

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Posted: 01/06/20 06:17pm Link  |  Quote  |  Print  |  Notify Moderator

As an engineer, I hate "feelings" not supported by hard data.

1/4 tank left, went with premium. With tank down to 1/4 again, came across a station offering 93 ethanol free and filled it up again. started climbing the hills between SC and NC. Filled up again at another station in NC and proceeded over the mountain.

I perceived the turbo working a lot less and engine just seemed to be smoother. Not the experience I was expecting.

LanceRKeys

Amarillo, TX

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Posted: 01/06/20 06:22pm Link  |  Quote  |  Print  |  Notify Moderator

What were you driving?

NJRVer

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Posted: 01/06/20 06:26pm Link  |  Quote  |  Print  |  Notify Moderator

philh wrote:

As an engineer, I hate "feelings" not supported by hard data.



I perceived the turbo working a lot less and engine just seemed to be smoother. Not the experience I was expecting.



Then as an engineer, what you perceive is just a "feeling" until you prove it! lol

dodge guy

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Posted: 01/06/20 07:02pm Link  |  Quote  |  Print  |  Notify Moderator

There's is no comparison. Non ethanol gas is much better for performance and mileage than gas with ethanol added. When I had my V-10 Excursion I filled with 93 non ethanol when ever I could. Always felt like I picked up another 30HP when I did. And I gained noticeable fuel mileage.


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Lwiddis

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Posted: 01/06/20 07:13pm Link  |  Quote  |  Print  |  Notify Moderator

“Feelings?” National Enquirer and Car and Driver report “feelings” regarding unknown vehicles.


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wildtoad

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Posted: 01/06/20 07:20pm Link  |  Quote  |  Print  |  Notify Moderator

Well so far a lot of feelings but no data to support the feelings. Did you get better mileage based on cost per mile? Was the extra mileage worth the extra cost? I have no qualms about real gas being better but at 30-50 cents a gallon more is it worth it? For small engines like lawn mowers and leaf blowers perhaps.


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Posted: 01/06/20 07:24pm Link  |  Quote  |  Print  |  Notify Moderator

philh wrote:

As an engineer, I hate "feelings" not supported by hard data.

1/4 tank left, went with premium. With tank down to 1/4 again, came across a station offering 93 ethanol free and filled it up again. started climbing the hills between SC and NC. Filled up again at another station in NC and proceeded over the mountain.

I perceived the turbo working a lot less and engine just seemed to be smoother. Not the experience I was expecting.


I don't know if it's my understanding or your reporting but I'm not grasping what you're trying to say? Your first tank was premium; second tank was 93 ethanol free; third tank was ??? And the engine ran smoothest on which fuel?


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amxpress

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Posted: 01/06/20 07:44pm Link  |  Quote  |  Print  |  Notify Moderator

I don’t know how you measure your turbo not working as hard, but your engine running smoother is very possible.
With today’s engine controls, timing will advance until the knock sensor(s) pick up a signal at which time ignition timing will stop advancing or re-tard the timing. Advancing the timing can produce more power and better performance. Using a higher octane fuel will allow the ignition timing to advance farther before the knock sensors start picking up a signal.
Maybe that’s why your engine felt as though it was performing smoother.


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blt2ski

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Posted: 01/06/20 09:34pm Link  |  Quote  |  Print  |  Notify Moderator

Most gas engines produce more power, better mph, HP etc with straight gas, vs adding alcohol, as alcohol has fewer BTU's than gas. Same is true with diesels. I do admit, with a bio disel mix, the motor does seem to run quieter. But less HP and mpg.not as cost effective.

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Huntindog

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Posted: 01/06/20 10:29pm Link  |  Quote  |  Print  |  Notify Moderator

I have a 73 Blazer with a carburator. Over the years as they increased the ethanol percentage in the gas, I have had to richen up the jetting, and milage decreased.
With todays computer controlled fuel injected motors, no tuning is needed, as they correct automatically.... But MPGs and power will still suffer.

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