What Do You Use For Gasoline ? - Page 2 - Chevelle Tech
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post #16 of 79 (permalink) Old Jan 29th, 20, 5:27 PM Thread Starter
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Anyone mix their own concoction adding some aviation gas ? Seems an easy way to boost octane for more compression.

I remember well how low compression killed horsepower in early 70’s.

I use mix of 93 no corn and aviation or 93 no corn and Race Gas Concentrate. Surprised no one is using RGC.
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post #17 of 79 (permalink) Old Jan 29th, 20, 5:38 PM
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Re: What Do You Use For Gasoline ?

Corolla, RAV4 both get 87
Chevelle, Camaro, Stepside, Corvette, lawn tractors, mower, snow blower, etc. all get 93.


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post #18 of 79 (permalink) Old Jan 29th, 20, 5:58 PM
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Re: What Do You Use For Gasoline ?

Pump E85 in the 55, everything else 87 pump gas...

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post #19 of 79 (permalink) Old Jan 29th, 20, 6:55 PM
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Re: What Do You Use For Gasoline ?

Quote:
Originally Posted by Dean View Post
All my lawn tractors, lawn mowers, snow blowers, or any other small engines get the get the ethanol free gas and every vehicle including the Chevelle gets what ever is the cheapest.

The Chevelle is not high compression and does not ping on the cheap stuff.
I've never had a problem with it in 33 years.

A friend argues with me and puts the highest octane in everything and I have to laugh at him thinking that he saves money because it gets better gas mileage.

You've never had any issues with the ethanol in the Chevelle? We used to run it in the Bronco until it ate all the rubber fuel lines. Before I knew better, I ran 94 Octane with ethanol in the Beaumont. Battled vapor lock for years until I figured out the ethanol gas was the problem. Since I switched fuels, no more vapor lock and I live in a warmer climate now too. The wife's DD gets the cheap stuff, my DD gets diesel. I steer clear of ethanol for anything with carb and any rubber lines.
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1977 Bronco
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The rest are boring responsible adult vehicles not worth mentioning.
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post #20 of 79 (permalink) Old Jan 29th, 20, 7:51 PM
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Re: What Do You Use For Gasoline ?

Mobile near me offers 90 non ethanol I add
VP Octane boost. Keeps my closed chambers from pinging in the Chevelle.

Mower 87 free.

Daily drivers get 87 ethanol.

72 Chevelle, 454, TH400, 3:73's

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post #21 of 79 (permalink) Old Jan 29th, 20, 7:52 PM
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Re: What Do You Use For Gasoline ?

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Originally Posted by TAG55 View Post
Pump E85 in the 55, everything else 87 pump gas...
Have you compared E85 and race gas at the dragstrip? Which is faster and by how much? Thanks
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post #22 of 79 (permalink) Old Jan 29th, 20, 9:24 PM
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Re: What Do You Use For Gasoline ?

My daily gets pump gas 87 with up to 10% ethanol. Wifeís daily gets diesel. The Chevelle gets 91 octane ethanol free, as do the lawn mower and snow blower.

My father tells me I was born 30 years too late.
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post #23 of 79 (permalink) Old Jan 29th, 20, 10:37 PM
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Re: What Do You Use For Gasoline ?

91 no ethanol for the low comp engines and 110 for the high compression stuff.


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post #24 of 79 (permalink) Old Jan 30th, 20, 7:54 AM
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Re: What Do You Use For Gasoline ?

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Originally Posted by novadude View Post
87 octane and 10.1:1 CR? What's the rest of the combo? Surprised that CR doesn't require 90+ octane.

4VR flat tops with cleaned up vortec heads, LT4 cam, quench at .038. It's in a '97 Tahoe, the computer has a lot to do with it along with 3200ft elevation. That and top shelf machine work and expert assembly
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post #25 of 79 (permalink) Old Jan 30th, 20, 8:02 AM
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Re: What Do You Use For Gasoline ?

Quote:
Originally Posted by sleeper View Post
Have you compared E85 and race gas at the dragstrip? Which is faster and by how much? Thanks
No I haven't used race gas in this engine.. When I built it the plan was to use E85 from the start, that way I would not have to change a bunch of things to go from race gas to E85.. so I really have nothing to compare it to... thanks, Gary

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post #26 of 79 (permalink) Old Jan 30th, 20, 8:05 AM
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Re: What Do You Use For Gasoline ?

A 1/4" fuel return line is mandatory with ethanol...
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post #27 of 79 (permalink) Old Jan 30th, 20, 8:19 AM
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Re: What Do You Use For Gasoline ?

[QUOTE=Reelysalty;11222252]Anyone mix their own concoction adding some aviation gas ? Seems an easy way to boost octane for more compression.

I have mixed many things Toluene at 10% in with 93 sinclair and add some MTBE and TEL.
Sure smelled good from behind the car.


I have mixed 1 gallon of E85 into 4 gallons of 91 Octane 100% gas.
My old carbed 57 chevy really likes that mix.
I mixed it with more and more E85 until I had to rejet from some slow feelings the car was having.
That began at 50/50 mix.
Then the Acellerator pump in the Edelbrock carb got soft and turned inside out.
Never had any fuel line issues.


But I drive my cars all the time.
My Toyota 1.8 liter engines get 87 octane 10% ethanol.
My V8 carbed stuff gets 91 or better 100% or 10 or whatever.. I rejet if I need to.


My small engines and outboard boats get 100% And Quicksilver 2 stroke oil in all my 2 strokes.
Never any carb issues on my boats with it and my oldest is a 1975 50 Hp Mercury outboard.


I have ran the mixed 2 stroke oil gas mix in my 4 stroke small engines and in my cars No issues.
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post #28 of 79 (permalink) Old Jan 30th, 20, 8:21 AM
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Re: What Do You Use For Gasoline ?

I wish I could get non-ethanol around here.

Cheapest I can get is 110 Sunoco leaded gas for $9.99/gallon, and that is only one station. Nothing else even remotely close to me except lawnmower stores with 5 gallon 90-94 octane ethanol free, for $15/gallon.

So - Iím using 93 octane up to 10% ethanol pump gas in the Chevelle.
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post #29 of 79 (permalink) Old Jan 30th, 20, 8:28 AM
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Re: What Do You Use For Gasoline ?

Same as Steve in MA.

AS a yut I used to mix toluene into SUN260. Thought the L88, and the LT1 before it, needed it! Plus, those sweet smelling aromatic hydrocarbons..." Ooh Ooh that smell!" Ruined the needle in Qjet once, and never did it again.

PS, as a former biodiesel brewer and user, I ALWAYS use Viton lined fuel line anymore. EVERYWHERE. Including my rat I forget the SAE spec, 30R9 or something. Viton tipped needles, etc. I may suggest y'all consider that.


True that the use of corn alcohol in engines is another clusterfck brought to you by the unholy alliance of big corp farming ( ADM) and our politicians at public auctions, selling our representation to the highest bidder. You spendthat much ENERGY to distill booze, you best be drinking it. Methanols, isobutanols are WAY easier to make.

Isobutanols, as ANY chemist will tell you , are WORLDS better fro road fuels. We dont use Ethanol as race fuel do we? There are very good scientific reasons why.

SUN93 / 10% ethanol in the Chevelle. Havent done a compression check on the new mill, but the 427 @ 210 psi cranking needed octane. It's in a race car now, so it'll eat race fuel for the rest of its life.

So what type of fuel do you use? needs a "for which engine" qualifier. We only have 91 non eth around here. The small engines get that, but the rats cant handle it.
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post #30 of 79 (permalink) Old Jan 30th, 20, 8:40 AM
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Re: What Do You Use For Gasoline ?

BTW - I forgot to ask, but any recommendations for an additive to add to the tank (if any) if I am using ethanol based gas to help reduce the negative ethanol effects?

Iíve read to stay away from additives that have alcohol in them. I havenít researched anything yet, and was wondering if I should even bother, and if so, what is best to use.

1972 Chevelle, 454, 200-4r non-lockup, 12 bolt 3.73
1981 Camaro Z28, 355, TH350, 3.73
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