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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Gas Engines >> Gas Oil Mixture
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Gas Oil Mixture - 10/31/2006 6:48:33 PM   
aeroviasx15


 

Posts: 8
Joined: 7/2/2005
From: Miami, FL, USA
Status: offline 		I would like to know what is the correct gas and oil mixture for Zenoah G-38 engine, like how many ounces of oil to the gallon of gasoline. I feel mathematically confused with the ratio explanation on the engine manufacturer's instructions and want to know a simpler way of mixing. Thanks
       Post #: 1

RE: Gas Oil Mixture - 10/31/2006 7:08:26 PM   
dirtybird


 

Posts: 3130
Joined: 1/25/2002
From: Mesa, AZ, USA
Status: offline 		3 fluid oz/gal works for me. Thats about 35:1

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RE: Gas Oil Mixture - 10/31/2006 7:22:31 PM   
Brian Smith


 

Posts: 487
Joined: 12/4/2001
From: Tullahoma, TN, USA
Status: offline 		You can go to the local motorcycle or Go cart shop and get a plastic beaker that is all measured/marked out in oz to gal so you can very easily find the exact ratio you want.. Cheap too..
40 to 1 Pennzoil outdoor/aircooled 2 cycle oil is a popular product and mixture. That is what I use in my Zenoah G38s..Brian Smith
quote:

ORIGINAL: aeroviasx15

I would like to know what is the correct gas and oil mixture for Zenoah G-38 engine, like how many ounces of oil to the gallon of gasoline. I feel mathematically confused with the ratio explanation on the engine manufacturer's instructions and want to know a simpler way of mixing. Thanks



< Message edited by Brian Smith -- 11/1/2006 1:01:28 AM >

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RE: Gas Oil Mixture - 10/31/2006 8:37:27 PM   
WLJ



Posts: 416
Joined: 1/2/2002
From: Enfield, NC, USA
Status: offline 		I've been using 4oz. oil/ 1gal. gas forever in Zenoahs. NO PROBLEMS

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       Post #: 4

RE: Gas Oil Mixture - 11/1/2006 12:54:03 AM   
Rcpilot


 

Posts: 6837
Joined: 3/20/2002
From: Arvada, CO, USA
Status: offline 		128 ounces in a gallon of gas.

4oz of oil

128/4 = 32

Thats a ratio of 32:1 meaning 32oz of gas per every 1oz of oil

128 ounces of gas and 3.2 ounces of oil yeilds 40:1 ratio

128 ounces of gas and 2.6ounces of oil yeilds 50:1 ratio

Technically, it's not exactly perfect, because TECHNICALLY you should be dealing with only 128ounces of fuel when your done mixing.

So, if you want to get TECHNICAL, you'd dump out 4oz of gas and then add your 4oz of oil back in for an exact 128 ounces of mixed fuel at 32:1 ratio.

I don't know ANYONE who is that anal though. Not with gasoline. Maybe a guy homebrewing glow fuel--but I have yet to meet a guy who will actually dump out 3 or 4 ounces of gas and then add his oil.

I run 40:1 in my engines.


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Airplanes have expiration dates. It''s just not printed anywhere on them.
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RE: Gas Oil Mixture - 11/1/2006 1:00:19 AM   
dick Hanson



Posts: 10264
Joined: 12/12/2001
From: slc, UT, USA
Status: offline 		approximately 30.076854732 to 1 -- is a good mix
unless it's gin -then about 100-1

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RE: Gas Oil Mixture - 11/3/2006 9:13:15 PM   
brachito



Posts: 12
Joined: 3/27/2006
From: Guatemala , GUATEMALA
Status: offline 		Hey Boys!!! Is there a correct technique to mix oil/gas??? The RATIO part got it nailed. I will be mixing 5 gallons gas on a 32:1 with Lawnboy ashless to break a DA-50R. Do I simply fill the 5 gallon gas container and then add the oil completey plus a nice shaking, or go bit by bit so the recipe will be done.

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RE: Gas Oil Mixture - 11/4/2006 12:01:36 AM   
Geistware



Posts: 12946
Joined: 4/9/2002
From: Locust Grove, GA, USA
Status: offline 		I put in about 1/2 gallon then pour in the oil and then add the remaining 4.5 gallons.
If you leave a little in the jug it also helps.
Then you don't have to put in the 1/2 gallon just put in the entire 5 gallons.
quote:

ORIGINAL: brachito

Hey Boys!!! Is there a correct technique to mix oil/gas??? The RATIO part got it nailed. I will be mixing 5 gallons gas on a 32:1 with Lawnboy ashless to break a DA-50R. Do I simply fill the 5 gallon gas container and then add the oil completey plus a nice shaking, or go bit by bit so the recipe will be done.



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RE: Gas Oil Mixture - 11/4/2006 12:45:21 AM   
Rcpilot


 

Posts: 6837
Joined: 3/20/2002
From: Arvada, CO, USA
Status: offline 		I fill a 2 gallon jug at the gas station.

Dump my oil (3.2oz per gallon) into the jug and then put the pump nozzle in there and squirt the gas in at high speed by squeezing the pump handle all the way. By the time I get about 1.5 gallons in there, the 2 gallon jug is getting full, so I slow down and put that last 1/2 gallon in slow to prevent spilling and overfilling.

Thats how I mix my gas and oil. The sloshing of that gas going into the jug at full speed from the pump nozzle is going to mix my oil for me. I usually turn it upside down when I'm done and give it a couple shakes just to be sure.

Then I pour 1 gallon at a time into my field jug. Easier to transport and lighter. Leave the 2 gallon jug at home and pump fuel out of my little 1 gallon jug at the field with my hand crank. Seams like a gallon lasts me about 9 or 10 flights--about 3 trips to the field.

< Message edited by Rcpilet -- 11/4/2006 5:18:14 PM >

_____________________________

Airplanes have expiration dates. It''s just not printed anywhere on them.
I''m not really an airplane pilot; but I did stay at a Holiday Inn Express last night.

(in reply to Geistware)
       Post #: 9

RE: Gas Oil Mixture - 11/4/2006 2:18:54 AM   
brachito



Posts: 12
Joined: 3/27/2006
From: Guatemala , GUATEMALA
Status: offline 		Thank GEISTWARE, RCPILET!!!! Sounds very easy, I appreciate the info, I will sure use the technique. This is my 1st gasser, so Ill keep u posted.(Extra 260 27% H9)

(in reply to Rcpilot)
       Post #: 10

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